RERA compliance: What builders don't tell you

What's the real scene with RERA compliance for projects like Suncity Vatsal Valley Independent Floors 1? I'm looking at a 2BHK around Dwarka Expressway, budget 1.8 Cr tak, but honestly, builder ka track record kaise check karein, samajh nahi aa raha. Parents keep saying legal checks pe dhyaan do. GTM Builders ka naam suna hai, but RERA site pe details sahi se kaise verify karte hain? Red flags kya hote hain? Builder-buyer agreement mein kaunse clauses avoid karne chahiye jo sirf builder ko favor karte hain? Is it possible to get an actual legal opinion on these before committing? Bahut darr lag raha hai ki kuch galat na ho jaaye. Any advice on title verification steps or encumbrance certificates?