I’ve found that there are a handful of passwords that you need to remember, the rest can go in the password manager. This includes the password for the password manager, of course, but also passwords for your computer/phone (since you need to log in before you can access the password manager), and your email (to be able to recover your password for the password manager).

You are also correct that length is mostly what matters, but also throwing in a random capitalization, a number or two, and some special character will greatly increase the required search space. Also using uncommon words, or words in other languages than english can also greatly increase the resistance to dictionary attacks.

Emily the engineer - https://youtube.com/@emilytheengineer - Does fun projects with 3d-printing

Evan and Katelyn - https://youtube.com/@evanandkatelyn - Does a lot of DIY/arts&crafts

Nerdforge - https://youtube.com/@nerdforge - Maker/Arts&Crafts, does a lot fantasy based stuff

Physics girl - https://youtube.com/@physicsgirl - Physics stuff, she has struggled with health issues the last couple of years, but her old stuff is still very good

Laura Kampf - https://youtube.com/@laurakampf - Maker, does a lot of woodworking and upcycling