Welcome Jerzy, congrats on your sober time and recovery efforts!
I was an introvert and isolator myself, so I found it necessary to hang around the rooms of AA and force myself to reach out for support and Fellowship. Now I've got so many friends in AA that I don't have a free minute to think about drinking. It might take awhile to feel comfortable, but the rewards are worth every second of discomfort.
Glad you're here!