As for spell checking, Microsoft Word, at least when it was more akin to a product, was pretty good at that. There’s also LLMs if you don’t have a problem with them, though I strongly suggest asking multiple ones just in case the one you ask decides to have a fever dream.

As for why wanting to make something, reminds me of the Ancient Greeks, which afaik thought immortality came from being remembered. Dunno if it’d be your case, but I find it an interesting line of thought.