I've bounced around a lot with meditations. I was very hesitant to start with many meditations for a long time. I started working on the 40 day meditation program about a year ago, and I'm still on day one. (This is primarily due to personal things distractions, stress, drugs use) So every day I've been doing void mediation, full aura cleaning and an aura of protection. What I found in my experience, it doesn't matter what you do as long as you're trying for something. All of this is trail and error while we try and train ourselves to a point of better understanding.
I started messing around with other meditations without worrying about messing it up, I started just trying to get a feel for stuff. I started a sun Square after months of confusion and I messed it up, but now I understand the exact date to restart, the order to do things, the hours of the sun and everything else.
I'd probably start with the meditation program, and work on your own pace. Im going to do the opening of the soul in a few days here, I've been in a loop for so long I figure it's time to keep trying new things!
I'm also unfamiliar with the 6 mo program so I'm not sure what's all included in that one.
Good luck in what ever you choose!
Hail Satan!