You need a workshop. You need a place to experiment, a place to play.
It doesn’t need to be a separate building. It doesn’t even need to be a separate room. It can be right where you are now. Just clear some space. Put away your usual tools.
The biggest change need only be in your head. You need a workshop mindset. Break things apart, see how they work. Put them back together but different. Start from scratch. Design anew.
You need a workshop.