My suggestion in situations like this is to not do contras. Or, at the hardest, do Sherry Nevin's "Family Contra"*.
When you do not have support of experienced dancers, certain learned behaviors (leave lady on right, cross over at top and bottom, concept of progression) are very challenging. I speak from experience; having a program of mostly contras - even easy ones - ends up being frustrating for the caller and the new dancers.
I strongly recommend an evening of Barn Dances such as Galopede, Patty Cake Polka, La Bastrange, Monkey in the Middle, and the like.
1) the walk thrus are short
2) everyone will end up being successful
3) people are moving to music, you are calling - they will have no idea it is not 'contra dancing'
Here is a link to a Dancing for Non Dancers handout that is woefully out of date but still useful.
Also, look at Thomas Green Barn Dance website; an fabulous resource.
Title: Family Contra
Author: Sherry Nevins
Formation: duple minor, proper or improper, doesn't matter
A1: Balance 2x, Circle Left
A2: Balance 2x, Circle Right
B1: Neighbor DSD; Partner DSD
B2: As couple DSD once and a half to progress