if you are starting now, first make sure your technical seo and onpage seo is on point, you have all the keywords grouped and all the pages are optimized as per their seed and relevant phrase. Allocate a budget for getting links back to your site, now don’t go bonkers on creating profile, comment and other grey/ black hat links directly to your website. And you don’t certainly need a DA 70 backlinks poitning back to your site it’s not about authority its more about relevant traffic. If you are getting a link from DA 70 whose niche doesnt matches with yours and its just for the sake it wont help us but instead if a similar link was acquired from a DA23 site which has 7k organic traffic from the same niche you are trying to do seo for it will do you some good.

Now if you are starting out you won’t be having such huge budget to spend so get a couple backlinks that are highly relevant and start to work on tiers to power them up.