Hi
@Guest 1012, great effort on your first attempt! Refraction droplet shots can be tricky, I did some resource guides on the forum you may have seen. For the most part I believe you have the components but here are some of the things you may want to revise for your next attempt:
DOF - (depth of field), this is a massive macro subject all in itself, in a refraction shot the photographer has the choice to either include the refraction subject (your daisy in your case) in the background as part of your scene
or exclude the refraction subject and make the viewer only see the flower via the droplet, this method highlights the refraction and droplet better but also means you have to play closer and that means a smaller DOF. Focus stack or cropping your image are workarounds but they both carry their own complications and downsides. You may well be shooting this droplet at a distance where a single shot will not give you the sharpness you want througout the scene. You can try going up to f/16 to see if this gives you the result you need, higher than that and you get diffraction and lose sharpness.
Lighting - I see you hit the flower with light which is perfect but i will agree with what the others said - the foreground is bit too dark, I would allow a little light to spill unto the foreground from the same light you used for the flower, or some other light source but just like you've done here avoid direct, strong light on the drop itself to keep the refraction from fading with the light.
The last two thing i will mention is to bring the flower closer to the droplet or vice versa, which ever is easier and works for you, try to fill out the droplet with the flower and minimise that dark ring around the flower. Lastly play with the angles, i like to have the flower centered right behind the droplet myself but thats all personal taste. I recommend to setup, get my focus and then magnify into the droplet and play with the distances, compositions, lighting, etc
Feel free to ask me any questions, I hope some of these help you
and i hope to see more.
Cheers,