Hyderabad first home buyers: total costs and risks?

Since last Diwali, I've been seriously looking for my first flat in Hyderabad. Moula Ali mein Salarpuria Sattva ke projects dekhe hain, but under-construction ka delivery risk kitna hota hai? Honestly, bohot dar lagta hai. Aur yeh hidden costs ka kya scene hai? Stamp duty, registration ke alawa aur kya kya lagta hai? My budget is already tight. First-time buyer ke liye resale better hai ya new launch? Which option feels safer for a first home purchase, honestly not sure.