Can I Mute?

[Hans Peter Augustesen]

You need to do BOTH of those things, not one or the other.

Muting yourself stops your send AND it stops you from hearing yourself (unless you can hear your instrument through the air, which is not the case here.)
Enabling direct monitoring (including doing it using a balance control) makes it so that you can hear yourself.

Yes.

I only need to mute by clicking on the speaker icon in the JamKazam interface. Then only I can hear that track.

Nothing else is required. The MONITOR A/B switch stays the same (DIRECT MONITORING OFF). And the MIX control stays in the middle position (as always). As in the attached image