I purchased the Saramonic wireless system:
Description If you want an extremely small, feather-weight wireless microphone system that delivers broadcast-quality sound to use with cameras and mobile devices, with the ability to handle two wireless transmitters so you can put mics on two separate people, nothing is capable of doing this...
www.saramonicusa.com
and the hot shoe adapter:
Amazon.com : Hot Shoe Adapter for DJI Osmo Mobile 3 & OM4, Woohoto O-Ring,Applied to Microphone and LED Light Accessory Via 2 Rotatable Cold Shoe Mounts : Electronics
www.amazon.com
I also already had the Litra Pro light which mounts easily on the hot shoe:
and an arm similar to this, which you can mount to a desk to get overhead views if you need to or to record yourself while talking. Osmo base will screw into it just like a tripod:
Do also have a small tripod (tabletop / 6-10 inch) that you can use in the field if you don't already have a large one.
Good luck!
PS..This is a quick trick to remove the DJI watermark in the 'story mode'...You can use those clips in your productions. Story mode uses pre-formated camera movements and effects of the Mimo app. Just follow the little tutorials in 'story mode' and create.