You can find a lot tutorials on our forum.

Most recent (2018-11-24) and most detailed (3 parts) Tutorial is from Katie (thanks a lot): Part 1 Part 2 Part 3

One of the best Tutorials ever are done by our forum member shaun who will cover everything. The good thing is that he is a real SEO expert and I can highly recommend all his tutorials:

There are many more tutorials who cover topics not only GSA tools on his webpage.