Calling preflop in hand is totally fine. You're doing the whole assuming you're wrong because you suck thing. Yeah you suck, but you can still get things right once in a while!

Try thinking about 3 betting vs flatting. What is villain continuing with if you 3 bet? How do you do vs this range? How does flatting compare with folding? How do you do vs his opening range? How does this reflect against the pot odds/price you're getting preflop? How will your hand play post flop? Will it flop well? Will it dominate villains range or be dominated? etc etc

Think about all these things and post some answers. You might mess it up horribly at first but if you say "I dunno I suck" every time someone asks you why you took X action, you sure as hell wont get better very quickly!

Becoming good at poker is about learning to solve problems on your own, and I find the best way to do this is a hands on approach.