Hyderabad legal traps: What first-time buyers miss in RERA and agreements

Since January I've been shortlisting flats around Gachibowli and Financial District, mostly 2BHKs. My budget is around 80-90L. Salarpuria Sattva's Sattva Lake Ridge looked good initially, but my parents keep saying to be super careful with legal stuff. Honestly, I'm finding it so hard to verify RERA registration details properly. Builder-buyer agreement mein itne hidden clauses hote hain, I had no idea. What if the builder delays possession, especially with OC? Sunn rahi hoon ki many projects get stuck. RERA complaints work bhi karte hain kya? Yaar, how do you check a builder's legal track record before committing? Any tips for first-time buyers on avoiding these legal traps in Hyderabad?