Lynda.com and CreativeLive are both very good. Lynda is free for a whole month, and then it's $25 (used to be, anyway) for a month of total access. CreativeLive is totally free, but it's shown lives, so you have to be there. I believe they also have recorded videos available to watch. Buying them is another option. They make very good instructional videos about using certain cameras.

Lynda sold her company a couple of years ago, and the new owners have expanded it tremendously. It took me a while to find their photography section.
https://www.linkedin.com/learning/topics/photography-2?src=ldc-nav&veh=ldc_nav_hed%7Cldc-nav&trk=ldc_nav_hed

Showing today on CreativeLive.com
https://www.creativelive.com/onair

For free -
https://www.creativelive.com/catalog/photography/free-courses?via=site-header_0

Aaaaah … yes - I remember it well … Dektol, Acetic Acid, Fixer … it was all so alluring, wasn't it? … When you went in, and your schnozzle picked up all these aromas - you were suddenly absorbed into a world of creation - in which YOU were the master. From that moment - all bets were off. You were there to get something done. And, there were no time-clocks - only the ones you used to time the solutions. It was a gas gas gas - wasn't it? … Do you miss it? … Do you still do it? … Or, are you thankful it's all in the past?

There have been lots of prior discussions on the pros and cons of insuring your photo gear. This is not one of them. I do want to ask if others have had a huge increase in their insurance policy premium. The premium for my Personal Articles Policy from State Farm increased from $187. to $275. I find that outrageous. Does anyone care to comment if they have been affected as well? Is there another insurance company you would recommend? My thinking is that as equipment ages, their value would decrease, not increase. It does state inflation coverage applies so that may be a factor. Thank you.

I might be missing something, but if your older Mac Mini won't support 4K, are you inferring that the video card in the Mac Mini won't support 4K? Or that your monitor won't support 4K? If your Mac Mini won't support 4K, then upgrading your monitor won't help. It seems that the graphics card in the new Mac Mini will support 4K however. It might be reasonable to consider a iMac 23". You get a new monitor and computer at the same time but only if your old Mac Mini won't provide the video resolution you are looking for.

I might be missing something, but if your older Mac Mini won't support 4K, are you inferring that the video card in the Mac Mini won't support 4K? Or that your monitor won't support 4K? If your Mac Mini won't support 4K, then upgrading your monitor won't help. It seems that the graphics card in the new Mac Mini will support 4K however. It might be reasonable to consider a iMac 23". You get a new monitor and computer at the same time but only if your old Mac Mini won't provide the video resolution you are looking for.