I have trouble seeing what fundamental mistakes I made during this FIDE rated game I played today. I played as white. The game was analyzed without an engine with people at the tournament were we discussed various variations and what me and my opponent thought when doing certain moves. This was a 90min + 15sec increment game which lasted around 3 hours. When playing such long game I believe that one should and could find something beneficial out of these games since these will truly reflect my strengths and weaknesses due to the long time limit. However, I have trouble finding something useful out of this game. I have trouble learning something from it. After the analysis with the people at the tournament I came home and started Stockfish to analyze further. I noticed and understood the blunders, mistakes and inaccuracies that Stockfish pointed out but these seemed to me very specific to this game which is why I am asking for help on this site now.
Do any of you see something more general which is not specific to this game that I could dig more into and improve?
I was very comfortable with the game and felt that it went well until very late in the game were I notice that black has advantage which Stockfish apparently shows that it has been slightly piled up almost the whole game without my notice.
I'm guessing someone will point out the light-squared bishop. I know and knew my light-squared bishop was a really bad piece this game and I had a plan which was in progress to move it to e6.
This was my first FIDE rated match and hence I have no rating.
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"] 1. d4 Nf6 2. Bf4 c5 3. d5 d6 4. c4 e6 5. Nc3 exd5 6. Nxd5 Nxd5 7. cxd5 g6 8. e4 Bg7 9. Qb3 O-O 10. Nf3 Re8 11. Bd3 f5 12.Ng5 fxe4 13. Nxe4 Bf5 14. f3 Qc7 15. O-O Bxe4 16. fxe4 Nd7 17. Rae1 Bd4+ 18. Kh1 Ne5 19.Bxe5 Bxe5 20. Rf3 Qe7 21. Ref1 Rf8 22. Be2 Rxf3 23. Rxf3 Rb8 24. Rh3 Qg5 25. Qc2 Qf4 26. b3 Rf8 27.Qd1 g5 28. Bf3 g4 29. Rg3 h5 30. Qe2 Qc1+