C.G.
Keep up the good work you are already doing! I remember that my daughter was the same way at that age... a great night sleeper and a terrible napper. I did sleep training once she hit 4 months old, but it was a tough transition. She eventually got the hang of it and by 6 months was a beautiful napper 2 X (sometimes 3 X) a day. The longer naps don't really happen until they get to be towards a year old. For the moment, I would nap her however works best... in a sling, stroller, etc. My pediatrician said before 4 months you aren't establishing any habits that you can't undo later.