I've been using the old Zhiyun Crane M2, a super small and light weight gimbal that is more than enough for the also small EOS M with a "normal" lens.
It works very well, but I have another technique that works very well and requires just the neck strap:
Hang the camera from your neck, hold it but not lift it, pushing it slightly down to keep the strap in tension. The closer to your body, the more stable it will be. From this position and with the strap in tension, maneuver the camera rotating or tilting as needed. You can adjust the strap length and the only downside is that you'll need an external monitor to properly frame the scene because the EOS M lacks a tilting screen.
The principle is similar as using a Cine Saddle:
It works very well, but I have another technique that works very well and requires just the neck strap:
Hang the camera from your neck, hold it but not lift it, pushing it slightly down to keep the strap in tension. The closer to your body, the more stable it will be. From this position and with the strap in tension, maneuver the camera rotating or tilting as needed. You can adjust the strap length and the only downside is that you'll need an external monitor to properly frame the scene because the EOS M lacks a tilting screen.
The principle is similar as using a Cine Saddle: