Welcome to the Course and Best of Luck. Good job! Homework #1 Done!
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.
Impatience is actually a huge leak for a lot of poker players. You have to find yourself a way how you gonna ignore it or make it disappear. Try every time remind yourself! Forcing into your life to be more patient in any activity you do, not only poker. Force! Force! Force! Always remind what you came to do and the patience will just help you earning more salary not the opposite. With more and more practice you will get used to it and might even stop being impatient.
Rushed decisions are just horrible. You will never profit from them, the money wont come faster but rather you will loose the money faster with fast decisions. Even sometimes take the timebank and think about the decision, what kind of range opponent could have, what kind of hand the opponent could be representing. All those kind of things will definitely help you earn even some profit from different kind of situations.
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.