Question

Since you have just started your preparation, you need not worry much about the score. This an certainly be improved.
I would recommend you to take both the sections along, else you face a risk of neglecting one section and will not be able to extract fully out of your mock CATs.
Your mock score shows a clear lack of fundamentals. In your preparation so far, how did you study? What material did you follow?

1. Did you take the test including AWA and IR?
2. Did you complete both the sections? (There is a high penalty if you do not complete a section)

Also, I would recommend you to refrain from taking tests until you have gone through all the fundamentals.
You need to build the concepts/fundamentals before you jump in solving the problems. You can do so by choosing one of the following ways:

1. In person classes/private tutoring
2. Online classes
3. Self paced online preparatory course
4. Book heavy approach

Whatever you choose, make sure that you choose one. Because GMAT tests you on some concepts and fundamentals that you can learn from a course. Most of the prep companies including ours offer a free trial of the course. You can take the trial and see if the course suits you.

In addition to the preparatory material, buy the Official Guides too and the 4 official mock CATs. They should be an indispensable part of your preparation.

You need close to 3 months to prepare well for the GMAT.

1. Understand the concepts and fundamentals before jumping into problem solving
2. Solve full length CATs including AWA and IR. You can get two free GMAT Prep mock CATs and can purchase two more from mba.com
3. Make sure you solve the official questions from the Official Guide