I guess you mean as white?
If your opponent plays as passively as the moves you show for black then it will be no problem. An 1800 isn't likely to play, for example, e6 on move 3. If they think you're weak and playing some 3rd rank setup many are likely to put 3 or 4 pawns in the center (e5, d5, c5, f5). This isn't necessarily the best (depending on move orders for example) but those kinds of positions will likely give you the most trouble.
Anyway, the first 6 moves for white make it look like the black side of a pirc, which is fine. In the position shown you can play for e4, d4, or c4 depending on what black does. 7,Nb3 and 8.Bf4 were not good moves in the game shown. On b3 the knight is poorly placed, and black can immediately play e5 (attacking your bishop). If you wanted a picturesque development (all pieces except king and rooks off back rank) then Bg5 was better... but if you really wanted picturesque development you'd place a pawn in the center at some point.
One of the main ideas with an opening like this is letting the opponent build a big center, then attacking it (play pawn break(s) and then pressure any weak pawns with minor pieces). That's one reason the knight was better on d2, it will help you play c4 or e4 some point later. I imagine often the c1 bishop will have to be patient on c1. After castling, play some pawn(s) into the center, and as the smoke clears you'll have a better idea where the bishop belongs. When you're only on the 3rd rank, the lack of space makes it hard to leisurely get all your minor pieces out as you tried to show in your example game.
I found an opening I really like but I am afraid if I play an 1800ish with it I will get crushed, plz help me. Is this any good?