- Drag the .mp3 into osu.
- Go into editor
Use a random BPM/offset for the time being.Do your best to find the correct BPM/offset.
- Place one hitcircle anywhere
- Upload the map (File -> Upload beatmap -> Beatmap help.)
- Post the link in this thread.
I or somebody else will attempt to give you a decent BPM/offset, good enough for you to map with at least. Note that it may need fine tuning after the beatmap itself is complete, but that can be handled in the beatmap's thread itself.