Ive managed to change the token sizes, so thanks a lot in that regard. Unfortunately, I play 3.5e and not 5 so the premade sheets wont work for me, as well, my players are going to want to make their own sheets, with my character generation rules, so theres that. I also plan to let my players roll instead of the roller, thats part of the fun of the game...at least as far as I think.
Im also going to buy some of those pre-drawn dungeons, hoping that someone actually drawing for roll20 formatted for them as well.