@BitsofData you came to the right place. These are a great bunch of guys and they're all willing to help (ok most of them, there's one or two pr$cks here but we won't go there
).
Lots of help available within these threads and during the week in practice lobby's. I was in your shoes not long ago, and still very much am. However with some guidance and help from these guys, over time, I now manage to 'usually' keep up to the pack, and 'usually' battle with some other guys throughout the race. Am i at the front battling for the win? Heck no, Have i had some great and fun races towards the back of the pack? Hellz ya.
I did find there's also a reality check required. Some of these guys are fast. real fast (and a couple are stooopid alien fast) and most of them make almost no mistakes. So if you're hoping to be at the front racing for the win...........weeeell you may want to have a look at your goals. At least for now.
For now, I'm ok with running near the back and having some good races back there. I made a progression from trailing the field and mostly running laps all by myself, to having battles at the back like i said (not all great races are for 1st and 2nd place, some GREAT races are for 7th and 8th too!). My single lap times and sprint race success has generally increased, due to better braking and race lines (better not perfect). now my next goal is consistency and doing that for a whole race with no mistakes.
One thing I have learned is that just running laps by yourself is not a lot of help if you're not braking right or taking the right line. Thats where these guys help. Alot. Youtube I've also found to be great help. search for a "track guide" of whatever track you're about to come upon. (of course make sure you select a gts version - sometimes theres others on there).
If you haven't already, check out the first couple pages of this thread. some of the guys have put links for various driving tips. I personally got a lot out of 'Tidgneys Driving School' on Youtube.
my 0.02 from one back marker to another.
(edit - just a couple posts before yours, fullness has a link/video for where to look....i actually got great benefit from that as well)