The panic brake grab is a favorite of new riders. Got me once, too. Another favorite newb trick is to chop the throttle at the first hint of trouble. That can get you in trouble, too.
Respect your front brake, but don't fear it. You can apply brakes in a turn, but you have to be smooth and in control. Takes experience, which you'll acquire one way or another. Obviously, you can't come to a complete stop in midcorner (bike leaned over) without going down one way or another. That's a car driver reflex. On a bike, your choices are to avoid the obstacle or to straighten and then stop. The second option is best for a newly minted rider, which is why they teach it in MSF course.
Pay attention to everything all the time on a bike. That's my advice. Anticipate what bonehead moves others on the road could do, not just what they should do. For example, just this morning a guy on a bike was coming up quickly on a car in the center lane of the freeway. As they passed me, both put on their left blinkers to move to the left lane. Instead of waiting for the car to change lanes and then making his move, the idiot on the bike guns it and zooms around the car to get ahead of him in the left lane. If the car had changed lanes immediately after he put on his blinker -- which a bunch of people do -- the biker would've been taken out, no questions asked. Dude was lucky today. Might not be so lucky tomorrow. That kind of rider is just a casualty waiting to happen. And no gear but a helmet. I wish him luck, but that shit doesn't last forever.
Hang in there. You'll learn