Where do I find tutorials on specific themes

Where can I find video tutorials on specific themes.m I'm struggling with a couple of things,MIT says I'm only allowed one menu, but there is a set buddypress menu but for some reason I can't add things to this as I can't find it. Also the sidebars won't work it keeps going to the default so adding widgets is a complete waste of time. Also how on earth do I add a slideshow to the front page. It's is supposed to be easy to use but I have to say it's one of the worst I've tried.