@insightful_media Just my opinion and experience with GMB.
I think it will help but is not fast. I always need a few months or more to ourank a gmb site if there is good competition. Most important areas imo, good reviews and a website that fits gmb. GMB usually shows pages in top 20 position (just seen but not sure 100%)
If there are other gmb with years just be carefull and work on your website to appear in page 1 or 2.
Regards

I am a 'practical' seo with a few years of experiencie, from Spain. Never studied anything related with it appart from several non official courses about wordpress, links, webs, etc. And a few projects enough for a cheap living. I learnt evertything from myself and the internet, and despite having a few good projects I can not demonstrate my knowledge. I would like to start as a seo proffesional working with clients.
Could you please recommend any good and official course to start in the seo business? Universities, agencies... anything that could help to start and have an opportunity.
Regards in advance.

@insightful_media Just my opinion and experience with GMB.
I think it will help but is not fast. I always need a few months or more to ourank a gmb site if there is good competition. Most important areas imo, good reviews and a website that fits gmb. GMB usually shows pages in top 20 position (just seen but not sure 100%)
If there are other gmb with years just be carefull and work on your website to appear in page 1 or 2.
Regards