If it is both terrifying and amazing then you should definitely do it. That is how great adventures happen! A great birthday or good luck card, or perfect for a graduation or big life event.
An A6 card with envelope. Blank inside for your words of encouragement.
Why not take the hard work out of sending this card and let me send it for you? Include your personal message and the delivery address and I can send it directly to your recipient! I'll use my best handwriting, promise.