If you installed the pushrods part of the installation is adjusting the length so that you have a neutral trim setting without using the radio trim. You will want to have as much trim as possible to use in your first flight to get the plane flying level.

I'll second jetmech05's advice to get with a club or at least an experienced RC pilot who is willing to help you. These planes are a lot of fun, but even a beginner bird like your Super Cub requires skill to fly. You don't have skill yet, and you also don't have a properly trimmed plane yet either. That's a bad combination. I'm sure there are a good number of RC pilots around Minneapolis who would take an hour out of their day to get your plane trimmed and throws set appropriately and show you how to do the most basic piloting properly. But if you absolutely must go it alone, take off with some tall grass in front of the plane maybe 80-100 feet away. That will give you a nice soft place to dump it if it turns out the controls are too out of whack for you to compensate.