Soon is not as good as now.
When you can swim, who cares how deep the water is?
Just start. Start now. Fail often. Enjoy the ride.
One way to work the system is to work the system. The other way is to refuse to work it.
Seek out habits that help you overcome fear or inertia. Destroy those that do the opposite.
The problem with holding a grudge is that your hands are then too full to hold onto anything else. It might be the competition or a technology or the lousy things that someone did a decade ago. None of it is going to get better as a result of revisiting the grudge.