Looking good, congrats!! It's an amazing feeling to get to this stage for the first time. ...it was for me, at least.
At your stage, i only pull leaves that are blatantly blocking a bud site, are bunched up or sometimes you'll get several leaves overlapping, i usually pull the bottom one or two. Basically when you get to this stage, no more big leaves are being created and as mentioned your plant will need em for reserves.