Betting is a learning curve, everyone who is succesfull at gambling or betting had to learn it the hard way.
I've made every possible mistake there is and it took my like a year of failing and losing quitte some money before I turned my strategy in something profitable. And even than I made a lot of mistakes and did stupid things with my bankroll. But never the same mistake again.

If you want to start again with betting, which is totally up to you and I'm not want to stimulate you, I advice you to make a plan, write it down and stick to it even when you're not winning at first.