Yeah, I experience this all the time. I've got dozens of interests and I often find myself in the same situation where I've put too much energy into research and now I don't have any left for actually doing it.

Here's what I do, I take a day away from whatever it is and the next day I put together the smallest thing I can do, rather than the best. It's even better if you can just use what you already have, supplies and research included.

In your case, cooking is perfect for this way of doing things. You can play with the recipe as you're making it. And unless you're dealing with raw meat at that moment, you can taste as you go to get everything just right. I recommend a simple vegetable soup. There's almost always some vegetables laying around in my fridge or cupboard and there's so many ways you can make it yours. Some veggies, tomatoes, water, and a couple spices is the simplest way.

After that, try swapping some parts out, maybe broth instead of water, or throw in some chopped chicken, or swap tomatoes for heavy cream and a pinch of flour, or play with the amount of ingredients, maybe more tomatoes and less veggies, or more veggies and less water.

I hope this helps and I'm sorry this is so long. Cooking is one of my favorite things and I think everyone should get to enjoy making their own food.