this OS is perfect and stable but i got 3 issues if someone can help me since i'm noob in linux

1- wheni try to connect through vnc is says the computer refused the connection
2 - How to get the secret key , i can generate the public api key from my account but can't get the secret key
3 - is there any tutorial to get openvpn to work through WAN , since the one in website is in russian .