I had a frame shop in Santa Monica for over many, many years. I did the chopping and joining and fitting and glass cutting of all kinds of things. Yes, things have gotten so much more expensive than in the late 70s, but there are better ways to frame your image without going to a frame shop. You did not say what size you or someone else had it printed. If it was not custom, there are always the thrift stores who may have the size and profile you can use... repainting or staining could be of use. Or maybe it's fine the way it is.

If you do not use a set back eventually the paper on which the image is printed may stick to the glass. You can buy small set backs as well as large to separate the photo paper from the glass. You can also use a mat. I will always suggest lignin free (acid free mat board) otherwise the lignin in the non acid free mat board will leach out and stain the photo paper. Set back material can be purchased in all sizes and is clear acid free plastic. But comes in long rolls. Or you can use a short strip of acid free mat board in the same color as the frame or the mat for the separation of the photo paper and the glass.

Then if the frame did not come with glass, maybe it's old and beautiful but the glass broke eons ago... you can go to a thrift store and see if you can find a frame the same size that has glass and use that. Or go to a shop and have them cut an appropriate size piece for your frame.

Whatever you do, don't sell an image that is touching the glass.

I too am a photographer and taught photography at the college level for almost 30 years part time. If you care to see any of my work go here: https://pixels.com/profiles/bonnie-dater-jay

OK.... I’m a reasonable woodworker with a wood shop. Normally I don’t sell photos but the MDI Photo Club had a show at Birch Bay(retirement community), and at the show somebody wanted to buy one of my 13 x 19 inch photos.

And so, since it was for someone else, Murphy got involved.

First thing I discovered was that my router would not do the job, too much wood to remove.

Then, I discovered that simple cutting the inside with my table saw did not work. I need a dado blade.

Then I discovered that my old table would break the RSV fence off when the bolt glued itself on by rust.

Then I discovered that I needed to cut to the new blade insert.

Then I discovered that I could not glue up the frame without putting a template on the inside where the glass goes to glue the frame against against or it becomes a RHOMBUS, and one side will not be parallel.

And then I discovered that the hardware store will not cut the glass if it's not square.

And then I discovered that if you use gel stain on the wood instead of strictly water based or oil based, it will form a thick solid top if its not sealed tightly (which is hard to do with gel anyhow)and you can’t get the stain out.

And then, I discovered that if you fall on the ice and need six stitches in your head, you will also break the glass and damage the print and get blood over everything.

And then I discovered that the device that puts the little slips of metal to hold the backing on will break the glass AGAIN if you use it wrong.

And then I discovered that mat board is horribly expensive on Amazon, and that I could cut plastic decking to fit, but that it was almost as expensive as mat board.

And then i discovered mat board for 7.50 each.

And then after ordering 15 pieces for $112, that I HAD GIVEN them the wrong inside diameter, and of course thye would not take them back since it was my error.

And then I order new mat board, with a coupon for $101.

And then I discovered that I COULD NOT FIND a way to put the paper backing on, and so the inside of the frame now needs to be stained when it was not before. Along with this I discovered that it's not a good idea to use a staple gun because unless each one is perpendicular and in the middle it will spit the wood on the outside.

I DID DISCO0VER the nice lady who has been waiting at least a week so far longer than I agreed, is not upset, but does need it by Xmas.

She paid $150. But I have already spent close to $300 to make this one frame.

Of course now I know what not to do.

I took three semesters of photography in college, two were with Louis Stettner.
I was in NYC one day and stopped in at his studio. There was all sorts of sculptors there. I ask him who owned all this crap. When he said it was all his work his work I couldn't stop laughing, to me it was terrible. He 'confessed it was the reason he stuck with photography.

I did get A's in both semesters.

https://louisstettner.com/

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Making frames is a particular technique that requires particles all tools and skills to efficient and worth it. Getting started is an investment (as you must have experienced in other areas of carpentry) both in time, tools and materials. Unless your production is below 20 frames and more, just buy a a frame in most hardware chains or Target (there are wood ones made in China that are pretty cheap and convenient. Other than that their are also online companies that will ship to your dimensions (ex: americanframes) a do a pretty good job. Asking advice from people who exhibit or make frames on a regular basis would have been a good first step, it would have saved you a lot of aggravation. Happy holidays. [PS: if you keep on perfecting your skills you may have a client here ;o)]