Hello from New York City!

Brand new to this forum. Not sure if this the correct category for my questions.

Have a couple of new user questions from a guy who is sitting on the fence and looking for an alternative to the current Android and iOS monopoly. Currently using Android and considering UT.

Questions

1. Does the open source password manager work on UT or is there an alternative?

2. Do Progressive web apps (PWA) work on UT?

3. Which supported devices is the easiest to get started with UT? What is the install and upgrade process like?

4. Can UT apps be installed to external SD cards?

Please forgive me for newbie questions.
Thank you.