Welcome to the Course and Best of Luck. Good job! Homework #1 Done!
Easiest way to fight against tilt is to set up stop-loss technique. Which means if you for example have lost more than 3BIs for a session then you just stop the session for some time. The BI amount is set up from your own results. Some may put it higher, some lower. Also after the stop you can spend some time with evaluation part to become better.
Lack of concentration is a common leak for beginners. They just play with music, watching TV, reading forums. But those kind of distractions really will just make you loose more money. Ain't ya there for win money?
So act like that and force yourself always close all kind of distractions and try to stay concentrated on the tables. Everyone will find their own way how they are able to concentrate more.
Position is the most important thing in poker. That's as well the reason why actually our chart advices to play less hands OOP and rather more hands IP when it will be much easier for you. You will face way too many hard decisions, could be very expensive leak.
Most of the weakness you wrote can easily be fixed by posting hands (analyzing your session). We will start writing feedback to your play. Usually negative feedback will put you into thinking phase and trying to fix all those leaks. It's almost the same as you lose money, you will remember it more than winning part. By this situation it's gonna be that negative feedback you gonna remember and try to avoid them next time.
Tight style is usually called playing selected hands. Like following the Starting Hand Chart. Aggressive should be also pretty clear that already the word says how you should be playing. But the problem playing aggressively is that you have to watch that you don't play too aggressive. Find good spots, find good targets. About The tight-aggressive strategy you can read in this article: "What is the Big Stack Strategy?"
Hopefully you will enjoy the Course. Some points earned.