Doors a paverbial pain when it comes to aligning
Ok assuming that the passenger side door works fine opening & closing & all the gaps look good then you can use this as your refrence:
Your going to have to release the hinges enough to manouver the door into correct alignment, now it could be lift the entire door or just pull the bottom hinge out or maybee push the top in or a bit of all. its a case of trial & error here & keep playing until you find the correct alignment.
Little tip here as i mentioned above if the n/s door is fine then a quick look at the n/s will give you an idea of when the door should align i.e panel gaps.
you may have to remove the lock catch off the b post & replace it when done (door alignment in a body shop is done with catch off then fitted afterwoulds)
the side door could be either the guides or the lock not aligned correctly try the guide 1st, these are the little plastic thing on the b post that guide the door in.
Ive only done a ferw vans in the bodyshop & its been a few years now.