Eh, I've docked enough in Kerbal Space Program that I made it the first time.
Biggest annoyance is that I needed one more sensitive step for the Z axis, as I couldn't null my motion even with the slightest taps.
That said, as I understand it the crew dragon isn't actually rated for docking.
Basically, "docking" means that the craft would do all motion until the hatches clamp together.
In this case, they get within a few feet/inches, and the ISS arm brings it in the rest of the way.