How to know how healthy sql server database now?

Maybe it is a little odd question but I am getting more into a DBA roll at my company.

So I want to know how healthy SQL database is now (before I started to work with it).

Then, in a month or so, I want to check again to see how healthy database is and compare it to previous state.

Basically is any way I can take like a snapshot of the database now and snapshot of the database later? And then see what’s been approved, so I can track my progress.

Any source of information would be great.