Keyword research for blog and SaaS

1-What keyword research method do you use or recommend for low competition keywords for a blog site and SaaS service? I tried this, but it look like not working as efficiently now. I tried it with Mediavine.com and
Ezoic.com.
https://www.blackhatworld.com/seo/method-how-to-effectively-find-keywords-with-ahref.1335575/
2- How can I use Ahrefs for low competition keywords for SaaS services? Or what do you suggest if any other tool?

Stop focusing on keywords and start focusing on topics.

Use longer search phrases that people commonly use online. These keywords are usually less competitive.

Hey, for finding less contested topics for a blog or a service, I'd say the trick is to really dig into user intent. Don't just chase numbers. Look at what questions people are asking on forums in your niche, check those 'people also ask' sections on search engines, and comb through competitor content to spot gaps they're missing. Focus on long-tail variations that solve a very specific problem your service addresses.