Sure go for it. Did you pick up the deal on Humble Bundle where you could get all of the Gamemaker Studio Pro add-ons that are usually over $100 each for a few dollars? I snagged it even though I do most of my design on Unity at the moment. I am really engine agnostic. I use what tool is likely to accommodate me the best at the time.

I've been posting quite a number of gamedev blogs. Some of them about my actual games didn't do too well financially here on steemit. Others seem to do well.

Best advice I can give is to post about what you enjoy writing about. Treat it like fishing. If it does well great, if not, simply keep on going forward writing about stuff you enjoy to write about anyway.