I'm never normally one to suggest AFF over the Category System (I'm biased, as a Static Line instructor ).
That said, everyone learns & progresses differently, has different issues & difficulties regarding skydiving training.
I have known people who have struggled with the student pivot exit, transfer to AFF & find it a much better system for them.
With only 2 SL jumps, it would certainly be unusual *not* to feel a degree of sensory overload. Lighter students can also find it more difficult to exit the plane on a static line due to the force of the relative wind pushing them back into the plane.
However, given that you've also progressed so far in the tunnel, I would say that AFF might well be the better option - you're ahead of the SL game, position-wise, & have a fair way to go before free fall where you can start to demonstrate what you've learned.
If money is the issue, I work at Nethers & would be very happy to spend time with you, working on your (SL) exit & discussing ideas how to help you overcome the issues you're facing but my recommendation would be to have a chat with an AFF Instructor, get the money together & use your tunnel experience to help you from jump #1.