I looked up pictures of your camera. Pretty sure you can add a shutter button. Unless yours is missing some part ?

Does it look like the photo I’m attaching ? If so the inside is threaded. I got my button on AliExpress for like $5. Thats what mine looked like too before I added the button. It’s way more comfortable.

I think it was a standard feature to have a threaded hole on old cameras because it allowed extra device things to attach for distance or automatic shutter control.

Yeah your view finder is pretty dirty too. It’s definitely annoying. Not much can be done about it.

Also yeah a f2 is still a pretty solid lens.

I get the desire to buy adapters. People have given me lenses and I’ve bought adapters in the past with mixed results.

There are always focusing issues. Or sometimes I thought the lens specs sounded decent but they weren’t really after I got it on my dslr. Or maybe it was that a lens designed for 35mm film doesn’t quite work for a digital camera.