When you set out to massively create back links for a website, the temptation to check for changes every few hours or days is high. Within a week you will most likely be tired and frustrated. And that is because it might take you over two weeks for your efforts to start showing results.

The other inherent problem with quick massive link creation is normally quality. If you create links wherever you can leave a comment you will end up with many low quality back links. It's best Google will ignore such links but worst case scenario could be an outright penalty.

SEO is a long term endeavor. While it's good to have targets, don't set them too high to frustrate your doings.

Cheers.

Can you create? Certainly yes. Should you create? Depends on how! If you are contributing to the overall knowledge of where you place the link then do it. If your comment doesn't improve the information value of what you are posting on them you are spamming and you should stop immediately!

Well I think that this is something you need to take seriously. Linking from or to porn would most likely get you into SEO problems. I have heard that there are malicious competitors who do that type of thing. I would advise that you do a Google Disavow for the links coming from these porn sites. Please be in the know that SEO experts warn against over using the tool. If you are not familiar with the Disavow tool. I hope it helps and good luck.

Well creating a link like those you mentioned is pretty easy. But before you do ask if you really want to do so. I would say its a bad idea and Google will not like it and you will most likely get penalized for it.

If however you still want to go ahead with your plans, simply replace the domain with yours. There after get that link and ask a few websites with good Domain Authority to link to it and you will start faking your domain Authority. Fake is everything Google hates thats why its a bad idea.

I have seen relatively new sites using ethical backlinks performing better. Most of them are in car rental, transportation and tourisim. Its possible there other field but since I personally are biased towards transportation those are the ones i have seen. You could consider reaching out and asking how they are doing it!
Best of luck.