I checked your LFSWorld stats and it reports 121 Miles for you. You propably practiced more offline, but I'd suggest enriching your experience mostly with driving other cars and tracks.
What I'm aiming at is that you should try to learn more about how momentum and tyres work in LFS. Once you can imagin what the virtual car is doing in your head you'll find it a lot easier to drive good laptimes quickly. That alone should get you within 3 seconds of the WR easily. After that you may need more practice and some setup-knowledge.
I learned that after I wasted about 500 laps at FZ5/Aston Nat and never got closer to the WR than 2.5-3 seconds. After a small route through LFS for 2 months I narrowed that gap down to .5 within 15 laps. So practice isn't everything in LFS. Additionally you need to be able to imagin how the virtual car behaves. That either means you try everything out or you read up a bit on vehicle dynamics.
I study engineering, so approaching driving from the viewpoint of vehicle dynamics comes natural to me. I don't know how much it'll help you.
(By the way this is a nice strategy to keep concentrated. In endurance runs I keep thinking about differentials, ARBs, spring rates and dampers and before I know it I drove an hour at pb pace.
)
Vain