You're gonna have to keep in mind that strongman isn't powerlifting; it isn't all about 1rm. You need to be strong through a variety of rep ranges, AND you need some moving events in there to work on your footspeed.
If you head to startingstrongman, there is a free 12 week program you can use to get familiar with some basic strongman training.
Good luck dude! Strongman is an awesome sport.