Remember that tiny object that you found at the beginning? Put it somewhere where there is lots of light. Mount the camera onto a tripod and get the front end of the lens really close to your tiny object. Set the focusing ring to infinity. Select an appropriate aperture setting for the subject. Move the camera to a position where the subject is something like in focus.
That was a very early effort. Like half an hour after the package with the reverse adapter was opened. I've got a lot to learn, I can see that. I have worked out some ways to make my pictures better and I will need some time to explore that.
But BLOODY HELL! This is incredible!!!! Those yellow blobs are individual grains of pollen. BLOODY HELL!!!!!!!!
A cheap ring flash might be something to experiment with. You can pick a new one up for under £25.00 these days. THIS is the one I bought, but haven't used yet. Neewer sells what looks to be exactly the same flash, but a bit cheaper.