Welcome DJEzack!

For recommendations I would look through the games you've played a lot of Steam and watch the run for them and see if it looks interesting to you. Any of us could recommend our own speedgames but what we enjoy running wouldn't necessarily be something you would. So finding a game you already enjoy and would be willing to put time into the run is the most important thing to look for.

For streaming, most people do it through OBS (https://obsproject.com/) and capture their game as well as window capture LiveSplit to keep track of their times (http://livesplit.github.io/). XSplit is also an option for capturing and WSplit for splitting, though they aren't as often used.