First and foremost, I would like to welcome you to the Falcon community!
At the risk of engaging in a little 'fanboyism' I would just like to say that Falcon is probably unlike any other PC flight sim you've ever played. For me personally it is a hobby unto itself, completely separate from my other gaming activity. This may be something that you want to consider if you don't have a lot of time to spend on one game. If you really, REALLY find yourself enthralled with this sim (hopefully you will) then you will want to consider a top notch joystick and throttle as well. They can be expensive $50-$250, money well spent if you play often. I cannot describe how much more playable this sim is with a good HOTAS control setup.
I was completely overwhelmed by the magnitude of this sim when I began playing, 10 years ago. Oftentimes I still find something that I have absolutely no clue about (or it finds me! like an R-77 missile! lol) and basically: I still suck .
With regards to your post; as migbuster has alluded to; your questions are too vague and broad to be effectively answered in one shot.
Unfortunately the old forum 'frugal's world' is down, most likely forever, there were miles of how-tos and guides for new guys. Now there is very little. The FreeFalcon guys have a good forum but using information from them can be confusing for us Allied Force guys because of different key maps and a lot of other stuff. I'm not going into modding the original game here.
The best thing to do is print out the training missions from the manual (maybe just a few at time) set them on your lap and go through them often. Practice does make perfect. A lot of things in Falcon are 'muscle memory' (landing, air to air refueling, formation flying etc). For me this was the only way I could learn. Falcon is really more of a patience thing than an action thing.
To this day I still play one dogfight (furball) and one training mission (Landing Final Approach) before logging into my campaign game. This gets me 'warmed up' and trains my brain for the right sight picture when I land.
Just keep trying those training missions by the book and you will do just fine. Oh and don't forget to turn on Invulnerability once and while and have some ridiculous fun!
Best of luck!