Since you are still in the early stages, a stiffer boot is going to transfer energy more consistently and effectively to both of your edges assuming your board is setup correctly.
This has both positives and negatives for you as you continue to learn.
Depending on the terrain you ride, too stiff of a boot might hinder your ability as it's tougher to make subtle moves with a stiff boot.
Think of a really stiff boot like the acceleration pedal of a ferrari and a soft boot as the acceleration pedal of a toyota camry.
The ferrari accelerator requires more precise pressure in order to achieve your desired goals as it naturally wants to redline with any kind of hard pressure. The camry takes far longer to hit the redline but you have more room for error since you can mash it down without much consequence.
I ride a very soft boot as well as a very stiff boot depending on the conditions of the day + my goals. If I want to butter and do ground tricks, soft boot all the way. If I want to go as fast as possible, stiff boot.
You can make any setup work...It's all about your muscle memory and ability to be subtle when you need to. If you still don't have that dialed in, I'd go with a more forgiving boot for now unless that boot you are talking about feels like heaven on your feet.