On your screen you should have two action bars, one for skills and a smaller one for options.
One of icons on the smaller one of them is for macros. It lookes like a PC, if you click it, you can see a macro icon, it looks like a cog wheel.
If you select it and choose create New Macro, you will get a number of options that effectively talk you through each stage.
It starts of with a "Name" and a Key that you want to assign to that macro. Macros can also be dragged to your skill bar.
Choose Add Command, it will then present you with options to build your macro, similar to a stanza in some respects.
Just ask in guild chat if you find any of the stages hard to understand
