i accepted an invite to my friend's island, but i didnt knew it would delete my own island. i tried to see if i can get a new island, but it keeps sending me back to my friend's island, so i was wondering if there is a way for me to get my own new island?
You would need to fully leave your friends island in order to start a new island. You can find a list of available commands in game by typing /help
It's probably something to do with leaving. /is leave might be it and then confirm it. Hopefully you are able to solve that issue.