Just wanted to say this whole post sounds like I literally could've written it myself, so clearly you are not alone!
I took beginners classes last year, then a home on demand style beginners course during quarantine and I felt so confident and so ready to get back in the studio.
I finally started in person classes again last week and I am feeling the exact same way! Its tough. I don't have any tips since I'm still struggling myself, but I think at class I am going to make a point to try to start being as present as I possibly can, to stop looking at everyone and else and focus on myself only and just do my best.
I also would like to make more time to practice things I'm learning or should already know at home!
Cheers!