Louis Rossman, a strong advocate for the right to self-repair, has an extensive, bottom to top guide on self hosting your own services. It starts from introducing what a modem is and what role it plays, and it ends with an entirely self hosted cloud. It comes in article as well as 13 hour video form. I would highly recommend this to anyone looking to get started self hosting - it doesn’t just introduce software you should learn, but it also shows you how to configure it.