pssat scores..

so i just took my first pssat, and i’m very concerned.
MATH: 640
READING: 630
VERBAL: 530

what can i do to improve this??

i got
MATH: 720
READING: 632-5
VERBAL: 649?

this is my third pssat:
MATH: 734
READING: 683
VERBAL: 684

i should say percentiles + totals oops
1st PSSAT:
total: 1800
percentile: 12 OOF

2nd PSSAT:
total: 2005
percentile: 54 hee

3rd PSSAT:
total: 2101
percentile: 76

my next goal is 2200