Here's one of my favourite clips of Tine Thing Helseth playing at the Nobel Peace Prize concert! Yeah, not a lot of respect for those trumpet-playing women.
[ame=http://www.youtube.com/watch?v=UE6VtJ7h0xI]Tine Thing Helseth - Fanfare (Nobel Peace Prize Concert, 2007) - YouTube[/ame]
Family can be funny can't they. If you love playing trumpet, then play! Nothing worse than sitting around in 30 or 40 years wishing you'd stuck with it.
The world is full of successful people who were told they should go and do something else. The world is also full of unsuccessful people who listened to that advice. Wow, I think I just coined a phrase!
Enjoy playing, put in the work, be realistic, and see where it takes you.