Hi jawhary:
You definitely have some cute kids.
Thanks for your kind words. I am impressed by your diligence in study--I imagine it is quite tedious for you to translate everything into your native language.
It seems to me that you have ordered the right materials for your preparation. OG is an essential book (which I'm glad you've received), and Manhattan GMAT books are supposed to be great (I've never used them myself but I hear good things).
Going slowly through the material is fine initially, but be mindful about your pace. This may be asking a lot, but at some point you should be doing about 40 SC questions within 70 minutes. One of the most challenging things about the GMAT is knowing how to pace yourself. It's best to get into the habit now of moving at the pace you wish to have for your actual test.
Some other advice I would have for you, since you seem to be just starting your GMAT prep, is to look at my blog (
https://beatthegmat.blocked) to get a sense of how I organized my studies. Try to figure out a good study plan for yourself before getting into your materials.
Work on improving your pace, and practice, practice, practice. Best of luck!
