From Wordpress to Directus, but on what server/domain?

Thanks a lot for the clarifications, So Docker is not mandatory, I guess I prefer to stay in the same server (subdomain option) then I need to install it with one of the other options. Can I do it not being a developer, maybe following some step-by-step tutorial? Do you know any?

Hey, I highly recommend using the Docker method. https://directus.io/docs/tutorials/self-hosting/deploy-directus-to-an-ubuntu-server