Hi Francesco,
I would say OG is very basic. Except the last 10-20 questions in each section, all others are very easy. You will find brilliant sources/study plans on GMAT Club, hence i will just mention a few important points.
First and foremost, take a diagnostic test to figure out your starting point.
1) Trying doing at least 10 questions(2 on each section) that can improve concepts and help you know your weaknesses.
2)
GmatClub tests are a great resource to work our sectional basics. But as you said the Verbal section is weak, you might want to use other resources.
4) Go to GmatClub Downloads/in your
Magoosh course, first work up the basics.
3) Gmatclub also offers Kudos for helpful posts. Try earning those with your posts and you can win these tests for free.
Some helpful links for daily questions:
https://gmatclub.com/forum/project-sc-b ... 81043.htmlhttps://gmatclub.com/forum/project-ds-b ... 80918.html-----------------------------------------------------------------------------
kindly give Kudos if you find my answer helpful.