Increase PF Raise?

I'm familiar with a ton of literature and Ed's SSHE, but I'm having problems putting it into practice I guess. I play 1/2 now but I can't seem to get my PF Raise above 7. My VPIP is 21 and I'd like to get my PF to 12. I raise automatically with AA, KK, QQ, AKs and Off, along with JJ. Mid to late, I raise with AQs and off, AJs and off along with 99 and 10/10. Should I raise with any ace on the button without callers? Also should I raise with 77/88 more? What do you guys do? It seems like its hard for me to pull the trigger on some raises. I know, it's probably because I'm a wuss, but any constructive crit would be helpful.