toughts on optimal hu strategy

[FieryJustice]

So I have been playing a decent amount of sngs on ftp over the last few days and I thiiiink I may be messing up some things even though I have a 14.5/11.1/11.9 distribution over my small 740 game sample since I got my new account. Anyways, I think I am having a bit of trouble when we both have around 20ish bbs. So, how do you guys play against someone who isnt that aggressive but plays well enough with no huge leaks? Are you making it 2.5bbs and folding to a push a lot or do you guys limp bet a lot? Any other info would be helpful with this, as I feel like this is the one part of my game that I could improve a decent amount.