offline sub profile

Another thing, you can't reset the achievements in your profile, but if you use another profile as I suggested in my prior reply, the new profile have 0 achievements.

The easy and fastest way to reach this is to create another profile on your PC and try to play with it, I hope the game works due to the presence of the real profile that own the license.

No one but you should be on your account

Only one profile needs gold on the xbox one all sub accounts don't need a separate membership however any console they recover it on needs to have home gold in order for them to play on other consoles

Child sub accounts don't need a payment option on file

Mine craft can be played offline without an online account but as required by all gaming services online play requires an online account

All current Gen consoles support sub account with out an extra membership

For a possible reason why your friend cant hear you

https://support.xbox.com/help/hardware-network/accessories/troubleshoot-chat-headset

Solution 1: Make sure your headset is not muted

Check that the orange LED light next to the mute button is not on.

Solution 2: Power cycle your Xbox One console

For help, see
How to restart or power cycle your Xbox One console.

For the Minecraft problem you can always fill in a request for support

https://help.minecraft.net/hc/en-us/requests/new

You have a gold sub according to your gamercard.You can't use trials on an xbox live profile that already has a gold sub.