I'm having trouble playing when I don't hit the flop and have some high unpaired cards or Ace plus low suited card. Usually I enter pots with a raise and C bet but scare cards make me fold too easily. It looks so easy when pros do it or someone in the tutorial explains it but it's different in game. How should I approach it? I know that it's all about outs and pot odds, statistics, hand ranges and all that. If I always fold too easily then people just re raise me more often.
I think you need to study more, understand what you've studied, so you need to practice what you understand. Your question is very superficial, what to do when you lose the first flop, most of the time you lose the flop, so
you have to understand the opponent's level before paying these bets, understanding this you can plan an action. but in what situation you're getting into, you need to know if it's worth paying these bets. So give time to your game, study, understand and practice, as time goes by, things get better. I will not tell you what to do because you need a lot of information inside your head until you find solutions to every problem. But for now, you can minimize these problems, not opening the hands that cause problems seems obvious and it is!
Sounds easy for the pros, right. but know that for those who are not easy to learn, they had to work hard for it. so if you want to improve your game. study, understand and practice good luck.