PCI Compliance - do I need it?

Specifically, I understand that many of the PCI requirements are covered by the hosting provider. Others PCI requirements are covered by the coding. Both of those things I don't have to really worry about, once it's set up. One thing I know I'll need to do, though, is enable SSL on the site. Is there anything else I am responsible to do, though? For example, annually get my site scanned for PCI Compliance? Manage my store in a particular way?

Any info is more than welcome! Things are a bit vague for me regarding this and PCI Compliance.

(Particularly wanting to use Stripe or PaymentWall)

It would depend... How many transactions are you doing per year? That would give you an idea of what PCI level you're going for.

If it's not that much then you can probably do PCI SAQ, external network security scan (i guess this is done by the hosting provider), and Attestation of Compliance (AOC) Form.

Still best to consult with a PCI audit expert.