An OM10 was my first SLR back in the late 80's. I used it for a couple years till I got into sports photography and desired a Nikon for more FPS and more lens options. I shot thousands of excellent photos with the OM10. It was lighter, quieter and smoother than the normal K1000 most people used. I won't say anything bad about it. In the late 80's Olympus's SLR system was at a dead end with the OM77af as their technical wonder which left me underwhelmed. Between their EOL system and my need for a sports camera, I had to choose between Canon and Nikon and went Nikon because I could borrow lotsa nice lenses.
I adjusted exposure by either using the film speed dial as exposure compensation dial or using the flash sync speed and varying the aperture.