Former band director and lifelong drum corps guru here...
Rent first. Kids tend to change their minds, a lot. Do NOT, I repeat, DO NOT, buy any instrument from
Sams Club,
Amazon,
Walmart, etc... Those instruments are junk. The local music stores will refuse to work on them when they break and trust me, they will break. I had a student who was using a passed down flute and it was beat up, but played wonderfully. Her mom got her one of these Walmart brand flutes, and the Eb key was bent within 5 minutes. I told her that if her mom had the receipt to take it back.
Also, if receiving a hand-me-down instrument, take it to the music store and have it checked out. There could be problems that need addressed (examples: Woodwind instruments may need new key pads, brass instruments need a chemical bath to get all parts moving, string instruments will need restrung, etc.).
For yourself. Get some earplugs. It's gonna be a loud, screechy start no matter what instrument it is.
For your kid, find out what instrument fits with them best. There is no gender specific instrument (I'll throw that out there) and certain instruments will just have a good "feel" to everyone.
If your kid wants to do percussion (or drums), make them learn BOTH bells and drums. It's super super important that they learn to read sheet music instead of just banging away on a drum.
Feel free to PM me for any other advice.