You might as well just buy the press now. Like most who started with the Lee Loader, I found it was just irritating enough to make you buy a press, dies, and a scale a month later anyway. Took me a little longer because I'm more patient than most.
What cartridge are you going to load for?
Here are some hints that might help . . .
1) Use lube to resize straight wall cartridges.
2) Use a nylon headed hammer to prevent mushrooming of the rod that knocks the case out of the die.
3) If your kit requires that you seat the primers by the hammer method, don't be too gentle or you will leave the primers too high.
4) If your kit included a hand priming tool, these don't work that well due to flex, and you might have to use the rod and hammer method to seat the primers flush with the case head.
5) Get a good scale (not the Lee scale either) you'll need it as there is no means of load development with the single spoon powder measure.