This page covers how to get started in sitfly including prerequisites and solos that you need to make.
Get with a member of Taihiko or a freeflyer that you trust and ask them to show you how to do the following:
This is a very simple dive. All you have to do to pass is remain under control until your breakoff altitude (5000'). If you have not accomplished this feat yet, then this is your dive. If at some point during the dive you lose control - Keep trying till you can do it!
If you're struggling with this then there are a couple of things that you can do. One is get somebody good (only if they're really good!) to jump with you and take a look at what you're doing wrong. It's a big plus if they have camera and another big plus if they're a professional freefly coach.
Another thing you can do is try transitioning from back to sit instead of from belly to sit. Back to sit is easier. The reason my going in position is a belly to sit transition is because I want you perpendicular to jump run. New sitflyers usually backslide horribly, and I don't want you flying up or down jump run. But so long as you can promise me that you won't be doing that, you might try a back to sit transition. Talk with an experienced freeflier at your DZ about how to do that.
If you've completed Sit Solo 1 - Congratulations! You held a stable sit from the moment you transitioned until 5000'! There's just one more solo, and a this is the additional ground training that you'll need.
Get with a freeflier that you trust and ask them to show you how to do the following:
The new stuff is that now you're exiting in a sit and performing 180 degree turns to the left and to the right. All you have to do to proceed is perform this dive without losing stability.
If you've completed Sit Solo 2 - Congratulations again!
At this point, you should feel reasonably confident that you can remain in a sit for an entire skydive. So, now you probably want to figure out how to fly around. That's where the Taihiko Trade comes in.
Try to jump/trade with people who are better than you. If you can't, then it's ok for you to jump with 1 other person who's at your same level. Keep it to two ways. Two people can always maintain eye contact and know where each other are at breakoff, even if the dive doesn't go well. As you get better and progress and eventually do bigger dives, continue to always ask yourself, "Am I going to know where everybody is at breakoff?" If the answer is "probably not," break it up into smaller groups.
Learn to really fly your sit well before you attempt any of the headdown stuff.
Be safe - the most surefire way to become a kickass freeflier is to keep jumping and not get hurt.