I need to get into my password manager as I am transitioning browser programs. And I can't remember my password to a site nor the password to my password manager.
Le sigh. I trapped myself in this hell but I still hate it.
When I'm making a new password for my manager I will actually write it down on paper, then type it over and over again until I can type it from memory, and then practice that every now and then (and if I'm not feeling sure, I'd probably make sure my password manager asks me for it every time and that I use my password manager often enough to keep training it)
But like, that's enough for my brain, and I'm not you. I wish you luck in finding a system that works!
Oh, losing that password manager password is my worst nightmare. I have the recovery key printed out and hidden in several places in the house, including one with my husband. I really hope you can remember it or find it!
You do need to type it sometimes though, and if you forget the password to the manager you may become unable to recover ALL of your passwords (and documents, etc) that you saved in it
Maybe you're already doing this, but consider coming up with a passphrase as opposed to a password. Something like "iwanttoeatwaffles7daysaweek!" is actually pretty secure and easier to remember than random gibberish. Here is Edward Snowden giving the same advice, and here is a relevant XKCD.
If I don't write it down on paper, it's gone, and if I don't have e-mail recovery, then I'm never getting back into that account lol. That's how I fucked up my first proton mail. 🤦
I know BitWarden works well and you can share your vault. It also auto fills and saves on most phones and computers you have it installed on. Use it with family members.
I had a similar problem with my old password manager and their customer support refused to help me (despite them being fully aware it was really me, the owner of the account, sigh). Password managers are great, but sometimes even having to remember one password is a pain.
What you could do is make up a random phrase, or a combination of unrelated words or acronyms that can't be linked to you in any way and can't be easily guessed by others (so not a birthdate, for example), yet are easy to remember (maybe because they are silly and nonsensical they will be easier to remember).