how to break through using pawn storm This is a game I played against my phone. I think I have an attacking chance with pawn storm. But staring at the situation for a bit, I can't find a plan to bring down black's defense.

When attacking with g and h pawns against a flat f7/g7/h7 structure, where do my pawns usually go (g5/h6 or g6/h5?)? How to coordinate my other pieces?

Any general suggestion or illustrative games I can follow to see how this is done?

Thanks
There are many plans for White here.
One is h5 and then g6 depending on whether the Knight on f5 hangs after fxg6. If instead black plays ...h6 you sack a piece on h6. Otherwise you can consider gxh7 check and attacking on the g file. Another plan is h6 and opening lines on the kingside. It seems that your pieces are not that well co-ordinated for these plans though.

All of this depends on concrete analysis. I would suggest the first move as 1.h5, with the idea h6, Qd4 and Qxg7 checkmate. If Black plays 1...f6 thwarting this idea then g6 and transposes to the ideas above. If Black plays 2...f6 then 3.fxg7. If 1...g6 then you have the option of hxg6 at any point in the future. edit eg after Rh1.