Not at all. To create an account on a new instance with voyager:

1. Click on your account in the bottom center.
2. click “Accounts” on the top left.
3. Click “Edit” on the top right
4. Click on the + at the top left

It will let you create a new account on any server you wish and use it with voyager.

For example, I’m on the lemmy.blahaj.zone instance, and I am communicating to you with voyager. But I also sometimes communicate with my alt @FundMECFS@lemmy.dbzer0.com and I access that from voyager too.