Personally, for us it came more easily because we already had alters that were unintentionally willo, but i recommend trying this:
talk into your head, out loud or just with thoughts. Eventually someone (or something, if that’s what you’re aiming for) should reply back. Try to imagine them, what they’d look like, smell like, feel like, etc. Try to talk to them!
In my experience, they do sometimes fade away after a while, but that probably isn’t universal.
You should also make sure that you really want this, because trying to rid yourself of them isn’t easy if you decide you don’t want to be like that later on.
Basically, just imagine someone. Try to send a message out to them in your mind, wait for a reply.
(It’s quite hard, but it’s a neat thing to do.)
-Chris (he/they)