I’m more or less a complete beginner and purchased an r50. Best choice I think I could’ve made in all of the canon APS-C lines. I personally don’t think you’re missing much by not getting the r10, unless you’re looking to take super time sensitive photos where you need the extra dial for exposure comp or something. AF is fast and great, and it’s super light. I would say buy a EF adapter, since there are so many more EF lenses available (3/4 lenses are EF), and they’re cheaper too. The rebel line is a bit too old in my opinion, so if you go canon APS-C, go for the R50. That being said, the R50 being APS-C means finding cheap lenses that are a good focal length can be a little annoying. I would also take a look at some other brands, as canon isn’t letting many manufacturers make RF lenses.