You are absolutely right. One-shot stories are a lot easier to write, especially when you don't try to cover a very long period of time in a fic. I've seen many (good) authors never writing anything longer than 1,000-2,000 words.

Start with limiting the plot to a few scenes. It's less stressful than a multi-parter that eats your brain and inhabits your nightmares.

And if you do start writing again, I'll be the first to cheer :)