Do I need to learn DBMS before MySQL?

Answer 1

Nope,You will​ get it eventually

Answer 2

no

Answer 3

No. Not in detail. You just need to know about how DBMS works which help you to understand the queries that you used in MySQL.
In SQL fundamental, you got idea. So Just start take the actions rather then being confused. if you have any doubt then post it, Solo Learn community is always with you.