[REQ] Looking for a solid SEO guide (adult/dating). total newbee

What’s up guys, I’m looking for a straight-up SEO guide, step by step, no fluff. Ideally something focused on adult/dating verticals.
My goal is to learn the basics, start ranking small sites, and get some traction
My First point = 100 organic clicks/dayli

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What I think I already get:

• Go low competition long-tail keywords first
• Content should be updated often
• Site must be optimized for mobiles
• Tech optimize matter

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Stuff I’m unsure about:​

• Should I bother learning HTML/CSS/JS or is it fine to go with site builders + AI nowadays?
• I wanna rank in DE / FR / JP
   > Is one multilingual site okay? Or should I make separate domains for each GEO?
• What are the dumb beginner mistakes people usually make that I should avoid early?
• What is "BlackHatSEO" ?

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I know I’m a new guy here and this kind of “hey give me stuff” post can be annoying, but I’m serious about it, ready to grind, test, and learn
If you’ve got any solid resources (threads / guides / blogs / YT / whatever) that helped you, I’d really appreciate it if you shared

Big thanks in advance

1 Focus on mastering keyword research for low-competition terms in your vertical first.
2 Site builders + AI are fine for starters, but basic HTML/CSS knowledge will help long term.
3 Separate domains per GEO tend to perform better for local SEO than a multilingual site.
4 Biggest rookie mistakes: poor on-page SEO, thin content, ignoring mobile speed, and chasing spammy backlinks.