It's just easier to address each person's questions in their own thread, they get more direct attention to their problems that way (instead of many people, and many questions, and everyone waiting in the same thread).
Events:
Category: Party Management
Command: Party Manipulation
Variant: Any (not sure about the differences, just use the default, D0)
Character: Choose a character to add to/take from the party
Operation: What to do with the chosen party member, take away, put in, move to reserve party, etc...
Fire away any more questions you have in this thread, and someone will get to it eventually, and if not, don't let the thread die, just bump it occasionally (not like 3 times daily or anything, maybe once every 2 days or something, depending on the day of the week, or board activity, everyone might just be busy).
It's good to also post your experiences and what you've learned, so you can look back and see your own progress, and to remind yourself what you did, or how you learned it, others browsing may have the same mind-set as you, and catch on as you do.