lower limt sng's

so this is my first post figured i would ask a pretty basic question i recently started playing a lot more sng's lately mainly the $5.50 on ultimate bet. i have done fairly well placing in the top three about 35% of the time but i have noticed my main leak is im having problem letting go of big hands or finding myself in to many toss up situations.( i tend to have the best hand 70% of the time). i think part of it is because of all the donks making bad calls or raises ( or me maybe??) getiing me in toss up situations and sucking me out. players are also so eratic i have trouble following moves sometimes. now i know that you guys are use to answering ?? about higher limits but any advice you can give someone looking to slowly build there bankroll starting out at these levels? should i just play more strait forward and not bother with anything fancy seeing how most people at this level wont reconize it?? any adivce will help thanks..