If it were me, personally, I would stick with 4321 and focus on the play of the hand before anything else. Once you learn how to take tricks, then you can start making whatever changes to system and conventions and whatever else you want. The ability to take lots of tricks will also give you better judgment in hand evaluation, which makes point-counting less important. This isn't exactly learning to walk before you run... it's more like learning to walk before you decide to pursue golf. Taking tricks is more or less unrelated to counting points, but it will make you more successful the better you get at it, regardless of what method you use. But like others have said, you should do whatever keeps your interest, and I imagine I didn't answer the question you asked.