How far I can stretch my marks

Hi everyone, I’ve started my GRE preparation using 1-month study plan. Before starting the plan, I’ve given prep1, fetched 300(157q and 143v). What can be my reasonable score after completion of the plan perfectly?

Ik this is a lame question. I’m asking because my counselor advised me to give gre between the 2nd - 3rd week of October. I’m currently investing 4-6 hrs and am able to complete day to day perfectly. However, in the homework question of TC, I’m fetching around 60-70%. Please help me by your experience, so that i can have some realistic expectations out of my study.

5 days done in 1month plan.
Gre exam between 20-25.

Thanks in advance.