Need advice.

Just started working with Java.

Prior to that I have more than 7 years experience working with PHP stacks.

Current project I am working on involves developing API bust mostly it is like firing select queries which some other team has written and using DTO objects for setting up response.

What things I learn so that I can fast track my learning process and be in a better position 6 months down the line.

I am planning to take the below certifications 1Z0-811 1Z0-808 java associate 1Z0-809 java professional AWS associate one

It feels like I am starting my career from scratch as prior tech stack I was working on had very less job oppurtinities.

So I wanted to fastrack my learning curve.

Any suggestions would be appreciated.