RERA compliance aur builder agreements mein kya dekhun?

My lease ends in 3 months and honestly, I'm fed up of renting. EMI vs rent math is finally making sense. I'm looking at a 2BHK near Dwarka Expressway or Sector 65, budget around 1.8 Cr. Builders like Ashley Estate dikh rahe hain, but I'm super worried about legal stuff. Builder-buyer agreement mein kya red flags dekhun? RERA compliance kitna important hai? Matlab, agar builder delay karta hai, toh RERA complaint sach mein kaam karti hai ya bas on paper hai? Any real experiences with projects in Laburnum Victory Floors 88A's area? First time buyer hoon, doesn't wanna get stuck. Please share your advice on legal checks.