Low DR after 1 year. Is it normal?

Hey everyone, I started my blog about a year ago, and according to Ahrefs, my Domain Rating (DR) is still at 1. I have 18 non-spammy backlinks, and my organic traffic is around 700/month, steadily increasing. I experienced a drop in traffic and keyword rankings after Google's December update, but I'm now recovering. I rank on the first page of Google for some keywords, but not in the first position—sometimes 2nd or lower. Is it normal for my DR to be this low after a year? What can I do to increase my DR and authority? Any insights or strategies would be really helpful! Thanks! EDIT:Thanks for yout replies! I have 130 published blog posts.