The 1st Chapter is one of the best mathematical discussions I've ever read, bar none. But hardcore math isn't needed for most of us programmers. Knuth knows this.

I suggest skipping around on an "as needed" basis.

Try Volume 1, Section 2.2 "Linear Lists", as a starting point. I promise you its an easier read than you expect. Despite being relatively easy material, you will probably learn something about arrays with just maybe ~3 or ~4 pages worth of reading material.

Start at the start of Section 2.2. Maybe work your way backwards to Section 2.1 as you realize its not as hard as you think (so you start at the "proper" starting point). And then go on from there.

Its really basic stuff. But hitting "rock bottom" on the subject of arrays, stacks, queues, and such is fascinating.