Should a newbie become a Realtor first before becoming Investor?

[Bruno Ferreira]

Hey guys!
I'm a new guy here, and I do have some contact with Real Estate as I was managing several Airbnb rental units, and dealt with many landlords in the process. 

I'm reading the best books I find about RE (you can recommend some too), and listening to Podcasts.

But I wander if I become a Realtor myself, I'll be able to learn so much more pratical knowledge, than I get from books. Moreover, all books are focused on the United States market, and some stuff does not apply in Portugal.

I have some rental sublettings that give me a passive income that is enough to survive right now. That's important because starting realtors don't get a salary in companies like Remax and Era. But they accept pretty much anyone who's interested in being a realtor, and has decent looks and selling skills.

Just wander if it would be worth my time. 

Kind regards,
Bruno