Looking for Link-Building Tips

I want to learn how people write articles to improve their SEO. How do they find articles websites and get links? I'm new to this field and believe there’s a process to create a network for affiliate marketing. I have a project related to pest control and I’m looking for ways to help my business grow. If anyone knows how to do this, I would really appreciate your help. I am asked many people but haven't received clear answers.

I'm currently testing expired local domains, that is, domains that include the city name. I plan to use them to build a sort of “mini-PBN.” What works internationally should also work for local searches (I hope).