All that's easiest to do it you have a stand. If you don't want to use the starnut, Hope makes a device that works effectively called the Hed Doctor. Either you have the shop install the starnut, you buy the tool and do it yourself, or you buy one of those things. I wouldn't recommend installing to starnut w/o the tool, but you can - good luck.
Don't forget about the brakes, those have to be removed.
If you don't want to cut he steer tube, you can cover it with spacers, if you can deal with the extra spacing either high or low.
The last fork I got, I had the shop cut it for me and put in a starnut. Took 2 min, tops. Installed it at home.