Any dating advice?

I haven't started my dating/sexual life til today at 22years old because of mental health problems that, combined with me naturally not being an outgoing person, gave me no will to do anything. Now that I got treatment and am starting to get better I feel like I'm too behind everyone to even start. Since I don't have much social skills due to the lack of socialization I had on the last 5 years I am somewhat terrified of how things can go. Any advice on what to expect, how to act, or what to do so I won't be consumed by fear? Thanks a ton