Is there some reason that wall won’t work fine?

Oracle a company to actively avoid doing business with or realying on in any way.

Spend the $5 for a commodity VPS from literally any standard vendor. I suggest Vultr.

I’ve got a couple VPSes, hosting

• Mailcow, because email is identity.
• Asterisk, because phone #s are also identity.
• Matrix-Synapse, for personal messaging even though XMPP is probably better.
• ttrss, even though it’s junk software with a jerk developer.
• A bunch of self-developed web apps

Self hosting email is obnoxious, but it’s also one of the only remnants of the traditional distributed internet that’s still broadly accepted.