How to go to NTA exam centre from Delhi airport?

I’ll be traveling to Delhi for an exam on Thursday. The centre is NTA exam centre, Noida. How can I go there from Delhi Airport? Any Ola-uber scene or any public transport (most preferred)? Also any advices for getting out of airport (knowing the cab scams) I will reach Delhi airport by 9 am and have to reach the Venus by 12:30 pm. I’ll leave the centre by 5:30 pm and got to reach airport by 8:00 pm. So what can I do in between time? Any good place to eat (on the way) or any spot I can visit quickly. Also any local famous eatery or souvenirs I can get? Thanks in advance.