You have caused zero problem. I hope you enjoy your Android device. I've never used an ios based phone but I'm sure there is a learning curve. We are here to help one another.. that's what these forums are for.
As for your music. Android enjoys your music in a folder called music. You can use the music directory that's likely on your phone storage and/or create a music folder on your SD card. Placing your tunes there or in folders beneath the music folder is what you want. The players by default will search the music folder for your tunes.
I've not used the sync software you mentioned. I just ported my tunes over from my PC via the USB communication cable with the phone set in mass storage mode.
Look for a music folder and see if your tunes are there. If not, just look about for them... I wish I had a clue as to where they might be. Once you find them, if they were synced, just move them to a music folder and all should be good. Again, I hope this helps.