I don’t know anything about NFP…so I’d take a class.
But…as for wedding planning?
Several things:
Do your own invitations. There are so many website that will print them up for you beautifully. Find a wording that you like and design away! You’ll save oodles of money over going to a print shop.
Keep the wedding part small, if possible. That way the extended issues of buying flowers for everyone, many more people at the rehearsal dinner, etc. is avoided. The main witnesses are the big thin anyway.
Choose a color that fits the time of the year. (Unless of course you have a favorite color

)
We married at Christmastime, so I chose red dresses. Each of the women got to pick a style that flattered them, but it was all the same material. We didn’t have to purchase extra flowers because the church was full of red poinsettias. Just bouquets. You could accomplish the same thing after Easter.
I tried on dresses in the high dollar shops, get the tag info (item number) and then had the exact dress made overseas (Ebay vendor) and saved over a thousand dollars. Was identical. Saved so much $$$, I wore a different dress for the reception.
My choir sang. Friends who were excellent liturgical singers led the music.
The only think I spent a lot on was the food for the reception, I wanted everyone to have a nice meal. But I made the table decorations, and they were pretty fancy. My sister came into town and we went to the venue and did the table tops the day before. The venue let us components for the tabletops.
We used a DJ instead of a band.
Beware though. Make sure you have someone sit at the gift table. There were a lot of young people at our wedding, and someone stole all the gift cards out of the envelopes, as well as all the wedding favors.

The people from the venue gave us a $250 gift card for their restaurant because they felt bad. But I never even dreamed that someone should sit there.

You’re probably thinking it was kind of homespun…actually it was very elegant. No one had a clue that I did a lot of legwork to save money. They thought everything was professionally done. You can do it. And it’s so much fun. Best wishes, and congratulations!