The interest check sections might be for you. A good starting point if you want to get into something planned with a group but new is the 'casual interest check' section. Though, some games do advertise for new players, these can be overwhelming in terms of joining mid-story and having to catch up. So it depends on the level of commitment, but I recommend shopping around. Any good GM should be very approachable to any questions, so feel free to pop them a question in private message/out of character about their game or story if it interests you.
Good luck!