For ring it may be too loose.

Nit poker 15/5 style should be enough on those tables however if you want you can open up and play some more big pot hands in good position. Microstakes are generally loose and passive postflop and this allow to value bet more marginal hands and play draws cheaply.

Playing 50% of hands from SB may be too loose too, SB has worst position postflop and lowered price from bargain hunting often doesn't compensate for acting first in all rounds. That appliest mostly for drawing hands like connectors and s00ted's, and marginal KJ'ish hands.