I would advocate for caution...

Trying to model a different style or simply making major changes to your own style WHILE moving up in stakes is potentially dangerous, because if you hit negative variance it's difficult to know what the problem is.

I would think moving up in stakes first and keep your play the same. If you are at all concerned about playing at higher stakes, you'll want convince yourself that you can win at higher stakes first. Then I would suggest opening up your game, little by little. Opening up the types of starting hands you play is simple... learning how to play each post-flop is the real trick.

GL