Most of those are all really simple, common things that are done when creating accounts on any service though. If Mastodon is literally the first service you’ve ever signed up for in your life maybe that’s justified but most people have made an account somewhere before.

And that’s the point OP is trying to make. It’s a very familiar process, except for step 1, which you can literally just ignore and pick the big highlighted blue button and avoid that scary and confusing “Pick another server” button if you’re not up to it.

NSFW, NSFL and Porn are the three categories that would be most useful to configure independently. While there are always gray areas and situations where either/or might apply, I think there are generally pretty clean dividing lines between those three that will cover almost all content.

This looks great but the link to the most interesting bit for me, Flohmarkt itself, seems broken. This is the working link to flohmarkt