If you must open up, I wouldnt do it with hit or miss hands like low PPs. If you're looking to learn to make tough decisions OOP then I'd call with stuff like AT/AJ/JT/etc, where you're going to make mediocre TP hands a lot and get faced with decisions.

Personally though, I've yet to hear anyone get the advice 'you're too tight OOP'. Seems like a strange thing to work on at 25nl.