1. Buy PT.
2. If you have a bankroll for 25nl then move up if you are killing the game (i.e making $100 per day)
3. At small stakes just defend your blinds with your normal range IMO. Most people dont understand the concept of blind stealing at small stakes and wont be doing it for that reason. Also, your big hands will get paid well anyway, so blind defence/stealing isnt AS important as it maybe at higher stakes.