it really depends on your content, how often you publish, if you do live-streams, etc.
We have a tool that might help you find an instance here : https://joinpeertube.org/instances
But it is far from perfect, and lowering the step on finding one's instance is one of our future challenges.
And a good rule with web hosting: thinking about trust (who would you trust to host your content, who would you trust as a "digital landlord"?), can help with finding the right one.