Depends on what you need:

• As cheap as possible, but actually want a VM: OCI free tier will be way bigger than you will probably need
• Happy paying money but still want to learn about Linux things: I’ve had good experiences with Scaleway
• I just want something I can set up and not think about: don’t use a VPS. Architect your site as a pure-static site, stick it in an S3 bucket. You’ll probably be within the free tier unless you do absolutely bonkers traffic, and once it’s running you can leave it alone for literal years without worrying about patches or upgrades