I can only give you limited advice in this arena. Other people should continue where I leave off.
Vanda seeds do not keep for very long. You must sow this immediately.
I don't think you have time to sow this in-vitro, as you would have to wait for supplies to get to you.
Try sowing ex-vitro.
First off grab a piece of bark that the Vanda seeds you collected came from.
Then follow these directions.
Lotte & Thomas Orchids
Don't use tap water. If it has chlorine in it you will kill the necessary mycorrhizal fungi to help you germinate the seeds and you will kill the seeds.