How to approach PSIR ?

Hey guys , need a genuine help regarding my optional PSIR.

The syllabus is huge . I’ve decided to do AW simultaneously whilst I complete a topic . Although I haven’t purchased any test series yet. I am referring to PYQ’s for attempting question . But the problem lies on evaluating them. Idk what to follow concretely since Notes won’t suffice.

Does anyone have free test series on tele of SR,or any reliable coaching . I’d be hugely indebted. I already did optional coaching wasted money . I certainly feel I won’t be able to maximise the most even if I purchased because I want flexible timings to write answers and attempt . So it’s if no use. Therefore, any suggestions and advice would be hugely appreciated.