Im looking at this game, is it fun?

Do i have to have premium to get good?

Any other info?

Depends
If you want to play it alone it can be a little boring. This game have no sound.
If You have some friends you can get on ventrilo or teamspeak. However you can just listen to winamp or something.
There also exist Open Tibia Servers [ots] but I'm not sure are we allowed to discuss about them here.
From few previous updates there aren't any bots. Of course there are exception but not for long.
Soon there's going to be a new update.

try tibia.com or youtube.com and get some info which You need

Tibia is a really fun and wholesome game, it seems a little cheesy at first but give it a try... if you ever need any help send me a pm.

What I love most about Tibia is PVP for sure