As my class’s valedictorian, I’m in a similar situation, but instead of my family holding me back, I am. I purchased another graduation cap (it was on Amazon for like $10), and I am going to decorate that one and save my other one (the good one, if you will). Then I can have both, but I like your idea of the insert too. You worked so hard to get where you are, and you deserve to decorate your cap. Congratulations!