Your public key block is a cumbersome thing and it's enough to just append its fingerprint, if you consider email to be trusted against forgery but not against eavesdropping. The other person can then use the hash to authenticate your key that they get some other way (or they could just ask you to email it).
Back in the day, lots of nerds would have their PGP key fingerprint (32 hex digits) printed across the bottom of their business cards. So if someone got a card in person, they could use the fingerprint to authenticate a key that they later received by email.
Your post doesn't ask about signing your emails without a good reason, but some commenter seems to think you are asking about that. That can be good, bad, or both, since it means that anyone who gets a copy of the message, including attackers, can now authenticate that the message came from you. Anything that gives attackers capabilities that they didn't already have, must be examined critically. Dan Bernstein came up with an clever authenticator scheme designed to prevent this exact attack, but PGP doesn't implement it and I actually don't know of any software that does.
Finally, at least some of the old-time PGP community now thinks that PGP solved, to some extent, the wrong problem. It not only made no attempt to conceal metadata, but it actually advertised it, in the form of key servers and key signatures connected with keys. Even if the attackers couldn't read the encrypted messages, they could still tell who was talking to who, which is almost as bad. Remailer and broadcatch systems tried to solve this, with mixed success. A quote by cryptographer Silvio Micali has stuck with me for a long time: "a good disguise does not reveal the person's height". I.e. don't just try to conceal the message contents from attackers while letting them collect other information. Rather, don't give them ANY information.
It's possible to get rather "Spy vs Spy" about this type of stuff but it can help you think about security. As always, "Security Engineering" by Ross Anderson is a fantastic book if you're interested in the general topic of how to be paranoid. Or to quote the proverb, it's not paranoia if they really are out to get you ;). The book is here, 1st and 2nd editions downloadable as pdfs: https://www.cl.cam.ac.uk/~rja14/book.html
I lose them all the time. Here is what I use now:
They are wraparound, comfortable, shatter resistant, cost $2 a pair when not on sale, and go on sale for $1 a pair fairly often including I think right now.
These days all those closed containers are virus spreaders so better to fly and get less exposure time. Wear an N95 either way.
In the old days I did some long bus and train trips and it wasn't so bad unless there were noisy or otherwise annoying people on board. Basically bring a long book to read, sleep when you can, and enjoy the scenery when there is something to look at. A travel pillow can be a help, and also warm clothes or a blanket. On international trains (EU) you can meet interesting people too.
I watched 10 minutes or so of this and it was actually fun. For some users a home theater system in this format could be a neat hack.
I'd say get a computer monitor rather than something sold as a TV. Less likely to spy on you. If your TV has a microphone, assume it is listening.
You have to be logged into a Google account for this to work. Also not mentioned is whether a new android version is required.
Email and sometimes irc. And old fashioned sms when needed.
Reed to T'Pol: "I was always rather fond of the name Stinky".
It was ok at the time, and if it isn't ok now, that means you want to run something that is too bloated for its own good.
Really though, special hardware for this doesn't make too much sense. A raspberry pi with two ethernet interfaces would be great, but if you can live with ethernet plus wifi, the current rpi's will do it. Otherwise there are lots of similar boards that really do have two ethernet.
I have not really felt much use for self hosted server hardware at home. I use VPS's for that and it's less hassle. Maybe it doesn't count as completely self hosted, but conceptually it's a miniature colo box.