Lots of good advice has already been given here. I just wanted to say I admire that you are posing these questions now, rather than later!
It's fairly easy to do a wedding when there's an unlimited, or big, budget - you know, just pay everyone else to do stuff. When my daughter got married a couple of years ago (which was a couple of years after my DH passed away), we set a very low budget for the occasion. She identified the 3 most important things to her for that day, and we went from there. Thank goodness for David Bridal's $99 annual dress sale, my sewing machine, a florist friend, a DJ friend, a friend-of-a-friend photographer - things started falling in place. She had the wedding during the day, which saved us a bundle at the reception. We did ready-to-print invitations from a party store (who cares about that anyway?), made favors ourselves, I sewed bridesmaid's dresses. All in all, we really had fun doing it because we did not stress over money. We ended up well within budget. The pictures weren't real great, we were sure the DJ was on crack, and bad weather spoiled the outdoor ceremony, but the important thing was that 2 people who were very much in love exchanged vows that day.
Keep it simple.