Need Starfinder advise

I wanted to play Starfinder on Roll20 but i noticed there isnt the support (books, adventures, character sheets ) that D and D and pathfinder has. i dont want to waste money having to by the physical copy and my players cant use any of the new classes and races. Is the only use for Roll20 the virtual table top? How do you play Starfinder with all books ( Armory  alien archives 2 and 3, pact worlds , character operations manual) if Roll20 doesnt have it and cant be bought in the market place. Any help with setting it up on Roll20 is greatly appreciated .. 

As I understand it, you should be able to add anything you want to a character sheet, just as you can with a sheet written on paper. The books just make things easier and quicker, like dragging things from the compendium.

thank you for the advise