The easy way is to create an account on Bluesky. That's as simple as creating an account on any other social network. The important bit though is that you can then, if you want, migrate to a different host and take your identity with you, or if you're brave you can self-host. This is by its nature something for power users, but regular users can use Bluesky accounts without ever knowing or caring about PDSs, DIDs or signing keys etc.