You have several issues.
1.You have deep desire to dance.
2.You are occupied with earning a living and saving for your wedding.
3.You wish to have a nice dance for your wedding day.
My two suggestions as a non-expert;
1.When you have a strong enough desire you will find a way,though it may not be as early in life as you might want.
2.Weddings can be expensive. Does your fiancee have intrest in spending time and money on your wedding dance?
3.My one suggestion as an expert;
As a wedding photographer, PLEASE learn a simple routine (a waltz,maybe?)for your wedding day. This 2 or 3 minutes can be the longest,dullest moments of your reception or the highlight of your evening!
You did't say where you live but there must be someone in your area who will teach you.
DON'T FORGET THE DIP!
P.S.
When I have the bride and groom aside for their sunset pictures I will "teach" them a nice dip for a photo. Most have never danced togeather before.
They always enjoy this and love that photo!
Couples who dance togeather stay together.
Please see samples at shutterbook.com.
stephphoto(wedding dance)
Good luck.