1) registrar and hosting: yes.

2) password manager, bitwarden is for free.

3) online courses: well, no. I won't pay for somebody that I won't watch.

4) ebook subscription yes, for leisure. btw, Scribd is a pirate site.

I must add:

* Azure and aws, you can keep an account for free and use when you need it.

* Also Oracle Cloud. There is a free tier that it is awesome:

* Zoom

* Office 365. Even when Office 365 has Teams but Zoom is way better.