You need a little technique help on this.
Watch the Log video in the Strongman course.
Most of it is the same for axle.
Learn to jump under it to press more weight.

In a contest, you need the axle or log to be motionless overhead with your arms locked and head pushed through your arms, and you must wait for a down command.

Practice this way as it is your first show you’ll want to make sure you don’t lose reps because of rules.

I suggest using a lighter weight that you can smash a few times to develop speed.