A fixation is something I am eager to interact with it a majority of the time, often to the exclusion of other stuff I need or want.

You’re overthinking this. You can almost always get by with whatever system you already have available, until you get a full job, at which point the job will probably provide you with a machine.

A special interest becomes part of my identity, and I am eager to interact with it a majority of the time. A passion does not necessarily meet those criteria.

Skyrim was somehow only 12 years ago

I think you’re misunderstanding the insert method. insert keeps everything that was already in the list, including the item at the given index. it just shifts part of it to the right to make room for the thing you’re inserting. Directly changing the list using display[position] = letter instead replaces the item at the index with letter.

Does that make sense?