Are the lenses Auto Focus? If not you could get one of those adapter tubes for OM to M43 like this or this.

But I know using the Viltrox or Metabones have glass that can help with the crop factor or whatever else you may have to deal with. The adapter tubes are just hollow.

I wouldn't see a reason stacking them wouldn't work, but you may be just adding space between your lens and your sensor and maybe a host of other problems... or no problems at all.

I used one of the hollow adapters for some old 1970's Canon FD mount with my GH5. They were amazing. But that 2x crop on the Micro four Thirds sensor can be quite alot, which is where the glass in the metabones or viltrox comes in handy. I hope all works out well, sounds like you're about to have a lot of fun.

The current Olympus mirrorless digital cameras use the micro 4/3 mount, which is incompatible with OM-System lenses (there were earlier Olympus DSLRs that used the Four Thirds mount, also incompatible, and now defunct).

You would need an adapter to mount OM-system lenses on a micro 4/3 camera made by Olympus and Panasonic. The lenses could also be adapted to mirrorless cameras from Sony, Canon, Fuji, etc. You'd need to match the adapter to the mounts on both the lens and body. There wouldn't be any particular advantage to adapting OM lenses to Olympus over any other brand.

These adapters will not make your lenses autofocus; focus and aperture control will both be manual using the rings on the lenses. Some cameras have features to help you focus, like focus peaking and zoom in the EVF or screen. In most cases, the field-of-view will be reduced because the sensor is smaller than a 35mm film frame.