Because I just got it recently am not asking to sell it to anyone on this platform all I need to know is where and how can I sell it I can give proof if needed
I can really sense and smell another tactic to scam people. You asked for a loan and now having 10000 btc, that is just a pure lie from a scammer.
Any ways any thing can happen when it comes to wealth because if you are not mistaken 10,000 bitcoins is a huge amount and if you are a newbie looking for exchange to carryout such large transactions then you should go for binance, as their have large trade volume.
There are some other exchanges that can provided such, Binance is a good option, Huobi global is not bad either. If the person is from US, it will be best to make use of coinbase for it. But, I am pretty sure the OP do not have anything to sell but a way to scam someone.