Well Mauro, welcome to the forum! I expect you can find many answers around here and people are really helpful.
Mine appointment, as you will see by the time line, was about a month after I sent my application over a year ago. Now, getting approved is a different story, I believe some people have been waiting for over 18 months! It is not going to be easy, there may be rejection, RFEs, missing documents, I just want you to be ready for that. It may take over a year or more, especially because there is a huuuuge back up in the line already, sometimes your case gets transferred, you may not find your case online, many things, many glitches in the system these days, do not get desperate.
Applying for a SSN is easy, and then you get the social a week later in the mail and whenever you apply for a job you may need to show your worker permit, maybe not. I didn't have to because they checked the SSN and knew it was good.
My process was pretty smooth compared to a lot of people around here, I didn't have to call USCIS after my paperwork and I didn't use a lawyer and it took me only 5 months!
Good luck Mauro!