Under-construction: My Sonepat Road first home jitters

Sonepat Road keeps coming up every time I shortlist something. I'm a first-time buyer, honestly confused kahan se start karoon. Orchid India Inframart Llp ke projects dekhe hain wahan, but under-construction ka darr lag raha hai. Builder ka track record kaise check karte hain? Delivery risk kaise evaluate karoon? Site visit pe kya kya dekhna chahiye jo builder nahi batayega? Log bolte hain bahut hidden costs hote hain... not sure if I'm missing anything big. My parents keep saying resale better hai, but new projects ache lag rahe hain. Ab samajh nahi aa raha.