Help analysing my my mistakes

So i almost always end up trying to fianchetto my bishops in positions like this and its a big mistake according to Stockfish.  i understand it leaves my knight on C6 weak but i can't think of any other way to activate my bishop and am afraid of falling behing in development.  As for the Queen mistake i assume its bad as it bloks in my bishop but i wanted to castle queenside and couldnt see another good square for the queen.  These mistakes worked out as i ended up winning this game but i dont want to form bad habits and want  have a better understanding of what im doing after the opening.  I feel like at the moment i only play for tricks and have no real gameplan.  Any help would be greatly appreciated.  Thank you.

If you want to activate your light-squared bishop, try to bring it out with Bf5 and then play e6. 

normally you don't want to combine nc6 and e6 in doubled queen's pawn openings. when you play nc6 in the d4/d5 opening, you are likely only going to play e5 later after some preparation, since you already blocked your other promising pawn break which is c7-c5. you don't want to have a stopover and play e6 and then later e5 if you don't need to. on the other hand if you had played e6, your most obvious pawn break would be c7-c5, and so there is little point in following up e6 with nc6 here. blocking the bc8 is just a secondary problem.

you can instead aim for this type of setup against the queen's gambit and other d4 openings. as you can see, black has harmonious development, and he did not have to obstruct his pawn break.

if you are wondering why you need pawn breaks, they are the most organic way of bringing the rooks into the game. you put the rook behind the pawn and you use that pawn to break open some files for that rook.

hi