Welcome to the forum.
That is a good microscope to start with. Its 40x and 100x objectives may be overkill, if you only view insects. It is good for pond protists.
I use this adapter and it works for all my microscope tubes:https://www.amazon.com/gp/product/B00OG ... UTF8&psc=1
Last photo of the listing shows how it connects to microscope eye tube. Basically, its bottom part holds microscope eye tube, while its upper rim has a T (42mm) mount and connects to camera lens/body.
I have a m4/3 camera too. You can use a Sigma 30mm F2.8 lens, connect the frontal thread of the Sigma lens to T mount, then connect the camera assembly to scope eye tube with 10x visual eyepiece installed normally. The eyepiece resides inside the connector and eye tube. View field that camera sees is very similar to visual view field that way.
Centration / optical alignment is important for good image quality. Also avoid system vibration. Try to use a camera with electronic (silent) shutter. Panasonic GH4 / GH5 of Olympus Pen F are said to be good choices.