Welcome! This is a great community, you just need to find a group to play with ideally, running alone is doable but is risky. Avoid Kavala, lots of RDM and trolling, instead go to any of the other cities, start by experimenting with Cocaine or Heroin if you want to try doing drugs, they're easier to get a feel of the server with. Excavating, vermins, mining, fishing are some good legal alternatives.
PM me if you'd like to get some help in game getting started, more than happy to run some stuff with you and get you off the ground.