I think it's important to find your niche. If you put out a post saying something like "I want to play your games", you're going to get bombarded, and most of the people, you'll never hear from again even if you do play their games.
I've checked out your website and it seems like you're trying to do a lot. If you can do that then cool, but I think a lot of what you'll end up doing is filtering, so you don't end up constantly streaming minimal effort platformers, or whatever. I'd always suggest finding the games that interest you first and foremost, and just chatting to the devs a bit beforehand in general. The streamers I get on with are those who take an interest in my games, and who I like as people, and often this forms good lasting relationships which help both sides.
I notice you're into pixel and retro games, so mine probably wouldn't be a good fit for you (I do visual novel style adventures), but there will be plenty of devs who are. So, yeah, first of all, I'd concentrate on finding the games and devs you like and are comfortable with, and then you'll have a much clearer idea of what works and what doesn't. A lot of planning's good to do, but you might find your channel naturally finds a different form to what you anticipate.