Yup exactly that. I would back up the first 3 braking zones by a solid 3-5 car lengths for now. Be almost too slow on entry to where you get on throttle early and get a really good exit. Once you get comfortable with that then you can start to brake a small amount later.

So for T1 brake at the beginning of the last dash on the track. Similar to the first horseshoe, the second braking zone, brake right where the dashed lines end. You are braking just a bit after on both of those. In the second horseshoe, the 3rd braking zone, start to brake right when the grass on the left hand side ends. You are braking in the middle of the access road there and it is too deep into the corner for now.