[Chicago Twister]

Webster -

When first learning the game, it's usually best to not try to master everything at once. Build a foundation of tried & true fundamental strategies and rely on them while you focus on the most important individual aspects of your game.

I'd recommend you just stick with the 4+n rule for now in all positions. The game is complex enough without introducing a complex preflop game, which makes the postflop game even more complex.