Can't argue with success.
It's probably totally fine, but once you move up to 10NL/ 25NL you'll get eaten alive by the blinds. You could raise pretty much every hand you play there, and call / limp behind a couple more profitably.
Steal is probably fine... depends on opponents. If you can't steal, then don't obv.

Look for spots where someone is raising too much or stealing too much, and 3-bet lighter - especially if you close the action (BB, no limpers/callers) or you're on the button. But still, try doing it more for value. Like if someone raises 20% of his hands, then AQs is ahead of his range, and if you got position it becomes an easy 3-bet. It has the added bonus that even some nits might call your 3-bets lighter because now you have like 5%+ 3-bet, nevermind that you would never 3-bet them that light.