Awesome, if you’re scoring around average with no help, then you’re in a really good position to start. Logic games are the most learnable section of the test in the eyes of most people. Get a book, and start studying .Mike Kim’s book is very good, and also the logic games bible. Those will teach some of the basic steps, and like I said, repeating common games will be very important. Also, what you describe is very, very normal. Everything seems fast and not understandable under time conditions. As a matter of fact, I had a friend who laughed the first time he did a practice test as well lol. It’s normal, but this is prob. the easiest section to improve on.