Hello, siccaz.
There is a guide on our site which answers on your question and gives more details about companions:
https://bannerlord-online.com/forum/index.php?threads/faq-companions.1855/
I don't recommend you to go to the WildLands if you are new and especially if you are alone. It's a PvP zone and you might be disappointed with the way how some people will attack you even if you are new.