Welcome back!
My advice is: Dive in! I learned the basics of Inform without any computer background at all, so it should be smooth sailing for you. And ask, ask, ask for help here. The cornucopia of help overflows in this place.
And you are in for a real treat with the amount of great games since your active period. A great place to start would be playing some games in the Free IF Playoffs going on now, where the top-rated games on IFdB are randomly paired and we vote on our favorite of each matchup. Round 1, Division 1 just ended, and Round 1, Division 2 is going on right now. It’s a great way to play excellent games and start posting about them in those threads.