First home decision, loan ready, ab property kaise choose karoon?

Budget finalised, loan pre-approved — now stuck on which sector. I'm looking at Dilshad Garden for my first property, but honestly, it's all so confusing. Tricone Projects India Limited ke kuch options dekhe hain, under-construction hain. But yaar, delivery risk kaise pata chalega? Builders toh sab achha dikhate hain. Koi experience hai yahan se? And what are those 'things nobody tells first-time buyers'? Matlab, site visit pe kya special cheezein dekhni chahiye jo baad mein problem na karein, besides just the flat? Bahut nervous hoon, it's a huge commitment. Koi advice ya red flags jo main miss kar raha hoon, especially for under-construction?