I would have participate in this Dfinance bounty Campaign but I don't understand how to set up the crypto wallet, it as something to do with testnet kinda, not straight forward to understand
Have you even tried reading
rules on their site?
Just click on a sign "wallet" on
https://dfinance.co/ and click "Create Wallet", follow easy steps and voila. If you have created wallets before, than creating dfinance wallet has identical procedure. Feel free to PM if you need any help.