Your ideas aren't dumb. They're sincere, although misdirected, ideas about how to encourage your university student, who is apparently a serious musician. And that sounds great!
My son graduated from a very demanding technical college and is now an audio engineer. I am not an engineer of any kind let alone an audio engineer (although I have learned where the volume button is on my laptop computer!!). My son is currently touring with a major recording artist on a monthlong nationwide tour and recently the artist performed at the Staples Center in LA (where the Lakers play; a huge arena). My son was responsible for the sound/microphones/audio for the whole concert - and we're so proud!
However, I would never attempt to try to infiltrate his field. Your looking for performing opportunities for your son or competitions to enter are nice gestures, but I want to encourage you to trust your son, his advisers and professors, his fellow musicians and peers to seek out these opportunities. You've obviously done a good job raising him, as he is hard-working as you say, and seems devoted to pursuing his chosen field.
Don't try to do his research. This has to come from him. The music and entertainment field is quite varied; there are all kinds of areas (individual performance, choral, orchestra, symphony, band, music law, musical instrument design and building and tuning are just a few I can think of off the top of my head) and you don't really know what specific direction your son will want to take. My son thought at first he wanted studio recording, but quickly realized after exposure to some audio sessions that live events was going to be his area of concentration.
I think that even if you were the conductor of the New York Philharmonic Orchestra, you would want your son to find his own way and make his own path in his career journey.
What you can do is be his mom. Encourage him. Listen to him. He'll have triumphs and setbacks. Attend a performance if other parents and friends are attending (don't show up for every practice and be "that" mom). Send him cookies or his favorite energy bars. If he's stressed over a performance or recital, try to take a small task off his to-do list (do a load of laundry for him, or take his suit to the cleaners). It's ok to learn some of the musical terms that he will be performing (if he says he will be singing a Renaissance chorale - ok, I don't even know if that's a thing - then look up a little about that style of music; don't immerse yourself in it or try to memorize an opera, but it would be nice if you could say to your son something like "I wasn't familiar with that but I looked it up and the history of that type of music is so interesting"). I have tried to become familiar in a very basic way with some of the audio engineering terminology - not enough to be intrusive, but so I don't have to call everything the whatchamacallit and the thingamabob.
If you do want to buy your son a gift that will help him in his career, encourage him to start a wish list on Amazon. You can see his list and choose a holiday or birthday gift that is really useful.
You can also keep pictures of him (newsletters, photos he sends you, pictures from his university or camp) and make him a nice digital scrapbook. Often university students don't have time to keep a nice record of their path to their career. Learn to do digital scrapbooking, or paper scrapbooking if you like paper and scissors and embellishments and glue, and make him a nice gift for someday down the road.
But let him create his path and find his opportunities. Be his encourager, his cookie sender, his listening ear, his proud mom.