I used to use my Nikon for IR but there are several factors to consider. You have to buy an expensive filter for every size lens you wish to use, you have to compose then put on the filter so you no longer can see what you are doing or if anything moved. You also have to focus on a different point for IR. A standard lens focusing on a point is not the same point of focus with IR Light, I am assuming you knew that right? There is an IR mark on your lens to show where it needs to be slightly moved to once normally focused, in order that the IR image will be correctly focused. Then there is a very long exposure time of many seconds and finally a long camera processing time before you can use it again.

In the end I bought a converted camera which allows me to use it like a normal camera, see the shots immediately, even freeze someone jumping in the air in IR or photograph a horse trotting by, none of which I could do with my standard Nikon and a dark filter.

As for live view, I don't know how you can see anything, since it still goes through the filter and lens anyway, if shooting with a standard camera and IR filter on the lens. Go with a converted camera, you will be much happier and use it far more often, trust me, I've been through it. I bought a converted camera from a company that did conversions, I had the choice of using my own camera to convert or they had a selection of used cameras that they had already converted. I went that route and bought one for just a little more than it would have cost me to convert my own.

That was years ago, it was the Panasonic DMC-LZ10 Lumix which has a Leica lens with a 5X optical zoom and was only 10MGPXL but it did what I needed and I'm still using it today.

When I was an Air Force photographer in the 1960's, we had a box of 4 x 5 infrared film and number 40 infrared flashbulbs in our inventory. I experimented by taking flash IR photographs in the base movie theater using a Speed Graphic camera during a show and got terrific results. The flashbulbs were not invisible; they produced a deep red flash, but no one seamed to be disturbed by it. We used one of those photos in that year's base guidebook. It is too bad that no one manufacturers an infrared electronic flash.