While I may 5-box, i procrastinated for awhile and made macros as simple as possible in order to just get by. As i developed as a boxer, and continue to develop, I have slowly realized that procrastination in this form of things causes alot of frustration. If you can slowly begin to master your macro making skills at this point in the game, then by the time you hit 70 you will be much better off and more knowledgable.

For example, a simple problem i can foresee you running into later on is in instances, if you are assigned to sheep 2 targets, without macros this gonna be irritating having to switch back and forth between screens. Learning how to take advantage of focus targets early on will benefit you greatly in your multiboxing experience. And as much as spamming an assist button seems reasonable, as you grow in level(and abilities) you will have more buttons to be pushing in your cycle, especially if you plan on pvping.

Remember that once you get used to more difficult methods it will become difficult to modify your methods without accidently turning to those ways.

Old habits die hard.