I did the same thing. At first I would charge into the corners way to hard brake way to late and come out way to slow. Then I got some advice and I started coming in to slow. I found the best way to figure it out is to follow someone that’s fast. You’ll be able to see exactly what your doing wrong.
After being in this for a year now I am throughly amazed at how much there is to “racecraft”. It’s pretty easy to show up on a track day and do what most are doing. After a few months I was able to run the average times pretty easily. Getting up to where the really good guys are is a whole diffrent story.
Someone mentioned it earlier on another thread. I think a drving or “racecraft” section in this forum would be a very good idea and probably generate a lot of participation.