most of the time blackhat SEO refers to the activity of building links. But until you need to build links you need to have a website that's ready to rank. And to get a website that's ready to rank you need to do other SEO steps properly, and those steps are not blackhat.
The reason I am telling you this is because you seem very interested in blackhat SEO but you sound like you don't know the basics of SEO in general. I might be wrong in my assumption and if I am, I apologize.
But if I'm not wrong then - again - you need to focus on something else before getting into blackhat SEO and the reason for which these other things are important is because SEO is a very expensive niche and if you don't get the basics right you'll end up losing money 99% of the time.
So, seriously, first learn the extremely important basics of SEO, which are:
- how to choose the right niche
- how to choose the right keywords
- how to create content that ranks and banks
- how to do on-page SEO
After you've gotten these 4 crucial aspects of SEO right and you have a website that waits to be ranked only then can you focus on blackhat SEO. Otherwise, you'll end up doing blackhat SEO to a website that never ranks because the basics are skipped / done poorly