Its not so much about proving yourself honest as proving yourself competent and skilled enough to deal with potentially disastrous (read: bankrupting) problems. If this site didn't deal with money (and potentially a LOT of money), my attitude would be very positive. The site looks very slick and well made.
Its also not really about your age either - but age is a simple indicator of experience, even if inaccurate.
I like your attitude though and wish you all the best.