Backlinking is a strong way to increase the domain authority of any website. But, it should be optimized and legally done. There are others who are doing a big spamming at the time of creating backlinks. for that, Google has created strict rules related to backlinks and other SEO factors.

Improve the content of your website and make it strong quality content. After doing that, publish your content on other websites whose DA and PA should be high. By implementing this strategy, there are good chances to improve your DA.

Start with profile creation then go for blog commenting

That's a good id ea to keep safe this forum