If you’re a blog with a small number of UK users, you’re not obviously appealing to children, and you haven’t allowed people to upload arbitrary images / video / files to your other users, then the realistic odds are you’ll be at no more actual risk here than you are / were from the cookie law or the GPDR.
This law sucks for so many reasons, and is inane, but the risk to micro-bloggers of £18M+ fines is, in reality, nil.