Calendex creator Eddy Hope talks about his updated monthly log that lets you plan the future flexibly.
Calendax is a way to merge your Future Log and Monthly spread together, and make something new. Like everything bullet journal, there are some variations of Calendax too. But this is a good place to start.
Well, there is nothing wrong with checking it out. But if you ask me, I think, you should stick with the basics / original system. Like anything new, its easy to get bogged down by all the options and spend more time optimizing the system then the amount of time saved by using it. So, start with the actual system, and if after a while you want to explore more options, you would know what works or doesn't work for you.