Maybe start with "Practical Electronics for Inventors" or "The Art of Electronics" to get the electronics background. Then go with "The Elements of Computing Systems" or "Digital Design and Computer Architecture" to get the digital logic and processor architecture background.
If you just want to assemble an 8-bit computer from parts, then, as other posters have suggested, go with Ben Eater's tutorials and kits.
Textbooks for these subjects can teach you. Also, you don’t need all that difficulty: 1) practice passing data from A to B. This is after learning some electricity, but you just want to catch some input, stop acting, then replay it: switch, to charge a capacitor-and-resistor, that unloads on an led after a few seconds. This is the entire principle of a computer, in a single action! I’m also sending Magical Help, since I’m an Angel. Take care!
https://eater.net/8bit/ (A series of videos) (Other Ben Eater subjects are good too).
https://nandgame.com/ (Virtual)
[1]Electrical, Electronics, and Digital Hardware Essentials for Scientists and Engineers
[2]Embedded Systems Hardware for Software Engineers
Computer Organization
By V. Carl Hamacher, Zvonko G. Vranesic and Safwat G. Zaky
Published by McGraw-Hill
I typed that in from the cover of the Second Edition, but that edition has a copyright date of 1984, so there are probably newer editions available given that this copy is now 38 years old.
Also:
Digital Logic and Computer Design
By M. Morris Mano
Unfortunately I don't have my copy of this one handy to find the publisher