How do I start improving score after completing foundation?

I have completed the quant foundation and am trying to figure out how can I improve my skills. I have gone through the startegies and try to apply them as and when possible.

What should be next steps be and how should I start practicing my skills?

How much should I focus on the hard questions?

Attached screenshot of quiz results -

Have you taken an ETS practice test?

No, not yet. I was thinking we should keep that for a closer date to our exam. Should I be taking those practice tests even if I don’t feel fully prepared with vocab?

A practice test at this point is a useful indicator to see where you stand.