If you want a strong foundation to begin your journey, I highly recommend NOVA Physics as a start up. Shouldn't take more than 2 weeks to complete the book. If you have more time, then utilize other resources like coursesaver - I haven't seen anyone present Optics/Lens as good as him. You can cram his videos in 3-4 days.
I really wish I had time to use TBR, but I was taking too many summer classes and working part-time. From what I've seen, those that use BOTH content and ALL the passages (making sure you understand their explanation) -- I haven't found a single person get less than a 12 with that approach. My only concern with TBR is, like others have mentioned, it's great for polishing your understanding and for someone who lacks that foundation, it's very easy to get lost in the details, so you have to be very careful there. I'd approximate it taking an additional 2-3 weeks to complete based on your pace. At the very least, TBR PS has the best practice material, followed by TPRH workbook (again, based on what I've seen recommended here).
You have to be careful to balance your time with all areas though, so don't forget there's 4 other sections calling your attention. GC is a great way to boost your PS score if you're struggling with Physics.
EDIT: Sorry, seen you already did TBR. Maybe give NOVA and TPRH a go. Both a great resources (although TPRH has more way passages). Kaplan FL's might be a little helpful too.
