This is a good start.
To me it sounds like you might want to get a tutor. In getting a tutor, it is important that the tutor helps you think about the problems the right way. I do not know how to predict which tutor will work out other than to try a tutor, and see if it works. I have seen cases where an older student worked out, or a teacher, or a retired teacher in the area, or someone else.
You might want to show your tutor some past test results. They can help you to work through the problems and understand the right way to approach these in the future.
And practice can help a lot.