At the risk of being facetious i would label the 'internet' as the best possible resource. But because i hate being 'that' guy i'm going to expand and recommend searching for appropriate reddit forums where discussions surrounding the system can be found. As this site is exclusively reserved for threads that relate to roll20 and its use I would also point out that this thread is technically off-topic and is likely to be moved to the 'off-topic pit of dooooooom' and closed (again, not wanting to be 'that' guy, i'm just telling you for future reference). All of that being said, and to bring this back to roll20 and potentially saving your thread, i would highly recommend looking at the various shadowrun games in the LFG (looking for group) forum and see if there is any set up that are happy to take new players and show them the ropes... there usually are, we're all pretty nice here. Failing even that, look for youtube videos of streamed sessions, do some research, buy some system material from the official publishers and get reading... you'll soon pick up more than enough to get started :) Best of luck