From experience, the bluetooth earbuds will be very uncomfortable under your helmet.
After experimenting with this for many years I have found a combo that works for me, and can maybe work for you.
I bought a Sena Unit (
https://www.sena.com/product-comparison-smh) which easily adapts to most helmets. This allows a multitude of functionality while on the bike. Music, GPS Instructions, Make/Receive phone calls, FM Radio, etc. If others in your group have a Sena unit you can also communicate helmet to helmet.
Because I care about my hearing I also use Earplugs designed to only block a certain amount of decibels, 25 I think.. (
https://www.amazon.com/DownBeats-Reusable-Fidelity-Hearing-Protection/dp/B00A3Z44R2). These block a majority of the road noise while allowing you to still hear whatever is going on in the helmet. They are very comfy, and have only bothered me after long multi-day use.
Hope this helps. Good luck, and let us know what you end up with.