Starting with quants - what to do?

Hi,

For not too long ago I started reading for the GMAT - which is hard when you don't know anyone who has actually done it.
After some googling I found the GMAT Club-site, which was a good comfort.

I understood what needed to be done, and how to do it - sort of.

To me, it seemed like the following three books was the most essential. I currently have them in front of me, and they were my game plan:

MGMAT Foundations
MGMAT SC
OG 13
+ some practice test that I have downloaded

I read through the first two books a while ago, and proceeded to doing questions in the OG 13. After some hours of effort I stopped answering them since I realized that my foundations should be stronger before I proceed. A lot of my answers in quant were wrong - which was frustrating.

This is exactly why I am posting this right now, and are asking for help.

I recently graduated with a bachelor in PR and are currently working mon-fri. My workday involves a lot of language and writing, so even though the English grammatical part is not perfect atm., I know that I can make this part on my own.

What I have a harder time to understand is How in H*** I am going to get better in maths.

I hope - or almost pray - that someone here can post a strategy for those of us that don't know that much math, which can help me - and all the others in the same position - towards gold and glory on the gmat quant!

I have barely done maths in the recent five years, but have done a lot of the concepts during high school. I just need some refreshing with a dessert on top.
Now I have read through the whole MGMAT Foundations book, taken notes and finished all the questions. I understood alot of it - which felt great, but when I stepped over to the OG I answered wrong on alot of the questions.

I have realized that the OG should be my last step before the test, and I need a greater understanding of the fundamentals in quant before I proceed with the task-solving.

What do you guys suggest?
Is the best way to learn by just proceeding with the OG-questions, and then learn by reading answers, or are there other ways?
If anyone have a plan or strategy that have worked out (from scratch) for yourself, I would be reeeeeeally greateful!

Just to point it out, it is not as if I need to go fra a good quant score to a great, we are talking from really bad to great. Has anyone been there?

Hoping for the best, thank you:)