I highly suggest before you get into anything in life that you research it. Especially finance. You should understand how bitcoin works before even thinking of buying any.
I'm not sure if Robinhood allows users to withdraw cryptocurrencies from their accounts, but you can do it the classic way. Sell all your holdings on Robinhood, transfer them to your bank account, then to an exchange, buy Bitcoin and then transfer them back to your personal wallet - preferably a cold one if you plan to hodl for long-term.
This is the right answer OP. But to what wallet you should use its all depend on you, can buy ledger wallet or use desktop wallet or mobile wallet depends on what you preferred to use that you can own the keys. But first sell all your bitcoin in robin hood and convert it to fiat then buy from reputable crypto exchange that you can use in your country .
Yep, the best way to go through it sounds criminal to me. Withdrawing fiat from a crypto exchange is just weird. Sounds very scammy to me. Why would a legit business do this? They wouldn't...
Yes, use local bitcoin traders only. The one I use is not some faceless scam like Binance and such. The owner is actually known and has an actual name and identity. Which means if something goes wrong something can be done, unlike these overseas shithole exchanges.
. Now you know what you will do, do it and make another move. Find another exchange to trade with or if you want to hold some Bitcoins then use a hardware wallet. 
