Yup yup.  The "Main Mission" will initiate soon, but again, not everyone is required to go on all of the main missions until we get toward the very end.  You can jump in and out of them as you please until it's indicated otherwise.  The Main Missions will essentially act as a trail of crumbs leading to the climax of the campaign.  I will initiate that at daybreak (in character).  I want to get some social time in first with other peoples' characters before then for selfish reasons.

Anyone and everyone can initiate a personal mission at almost any given time.  I would just prefer if you have at least one other person tag along with you.  For the main missions, either Finlay or Ryder will be required party members.  Other than that, no holds barred.