When I first started (with a Merkur Futur) I used to go ATG chasing that elusive BBS. It wasn't successful. I acquired a MÜHLE R89, ATG wasn't so bad. At the same time, much advice here was not to go ATG and don't chase that elusive BBS. I took that advice and improved my technique. Most of the time getting a DFS. I now go ATG, but not on my moustache area.
So don't sweat it at the moment, just go for two passes, accept that it may not be a great shave each day. Aim for a comfortable shave. Once your managing that without any issues, should you feel the need, try ATG.