Heuqh circuit starts with its main straight (not so straight) located in the center of the map which leads to a double left corner where race positions may vary from start.
The next non-stop right corners take you to the slowest part of the circuit to a hairpin that reminds of the Monte Carlo hairpin, nevertheless, this one allows to take multiple racing lines according to the race situation for taking the next fast right corner the best way.
Exiting the tricky section leads you a sharpy Copse, the fastest corner of the circuit which diving to much on the inside will make you bump the sunk tyre and throw you to the outside, also going two-wide implies losing to much speed. Hence it is better to wait for an overtake for the next change of racing line direction coming to the medium-speed left-right chicane.
For the last part of the track, comes a long right corner in acceleration, in which chances of a low-risk overtake is possible if you don't brake too late to keep the momentum in the last wide hairpin. The track finishes with a slow technical left corner.
The circuit also features a short version, being the first double left corner now a left right variant similar to the first part of Gilles Villeneuve circuit, rejoining the fast part of the track before the chicane.
AI line for the original Formula.
Talking about the driving: I tested the track with the original Formula. They mostly took the corners too far on the inside, maybe you have selected a very low AI skill? I had AIs around 100 and they weren't very fast, because they always jumped over the sunk tyres.
So while this comment is rather negative, if you enjoy trackmaking, keep going. Many people started like this or more likely even worse (My first tracks were really bad compared to this one) and if you enjoy doing your thing, that's the most important thing and you'll probably even improve your skills