Portable password / account manager

[Anna]

I want to start using a password manager due to the big amount of accounts I have. Currently I have all my accounts details in a notebook in my house (I know, not ideal). The thing is, I want to store more than just passwords. I want to store the same information I gave to the platform with their schema. For example, for facebook I will just store my email and password, but for github I need to store also my username, and for uber I need to store my phone number but no username. Also I want it to be bootable from a USB. I know this is a really specific tool I want to use, I thought in coding it myself but honestly, I am not a cybersecurity expert, I just want an easy way to manage my accounts. The candidates I am looking at are:

KeePass, +1 for being open source
StckyPassword, how secure is this?
I would appreciate really much any opinion or other recomendations. Since as I said earlier, I am unsure of which aspects to look out for truly securing the accounts data.

[Paul]

I store all account data in KeePass, password hints, date of birth, first pet etc, then when I need it I open KeePass. I keep a copy of the database on several devices, PC, phone etc and a copy in the cloud, just in case.
Using a long password that I can easily remember guaranties no-one else will be able to decrypt the database - password length is king when the only method of attack is brute force.

KeePass is completely portable, all you need is the database and your password, then you can use one of the many apps that will open a database, even an online app (KeeWeb).

To use any password manager from a bootable USB will require you to do the setup, but KeePass doesn't require installation so it's relatively easy.

Why not fire up KeePass and try it out for a couple of accounts you use regularly. Installation is simple and you can remove it just as easily.
The Global Auto-Type feature for login saves typing, and you can still drag n drop or cut/paste.

cheers, Paul