I can recommend this guide [1] to setup your yubikey with gpg, which allows you to both use it to sign or encrypt with gpg and also to use it as an ssh key.

[1] https://github.com/drduh/YubiKey-Guide

If all the servers you talk to are up to date enough to accept SK keys, I would use one:

https://www.yubico.com/blog/github-now-supports-ssh-security...