Fortunately containers can get bigger =)
While we aren't all the same, there's a difference between things that require holding 8 complicated things in mind at once, and things that require a little language learning and the intelligence to solve a crossword. This is closer to the latter - like doing a crossword in Spanish. You need to know a bunch of little things, but learning them is basically all tedium and not brilliant insights. (Taking these puzzles, creating a dozen new variants, and solving all of those probably does require managing a lot of complexity. But to understand the work of others, is not so bad)
depending on how much want to do, I have seen kits for ~$30. Pretty sure I've seen some small kits taken for camping, so they can't be too pricy. And if you can't afford it, just start bringing it up around town! Maybe somebody will get excited and do it for you.