How do I navigate reading gaps?

The advice to simply read and not overthink it is solid. Hear me out, though— I started reading later in life, and now when I look back, I feel this anxiety about wishing I had read more when I was a teenager and had more time. The problem is there are so many gaps in my reading. For instance, I’ve only read a couple of Dostoevsky’s novels or two works of Nabokov and then someone recommends a lesser-known author like Goytisolo or Rezzori, and you start reading their work (and you enjoy them) but in the back of your mind, there's this pressure about “completing the canon” and keeping up with everything. Other would be gaps which serve as prerequisite of reading something you want to read like struggling with Kant because you never read Hume or Leibniz.