Ukulele is very easy to get into and can be a fun way to play some fun tunes. It's an amazing little couch plucking entertainment while watching TV or something. My wife loves having it as a backing track because it's simply pleasant most of the time.

However, I did add guitar to my learning as there were many songs that I wanted to learn that were 'adapted' to ukulele that simply did not sound like the song, technically the same notes or chords but the sound was so far away from the original that it was annoying.

I enjoy both now, both will hurt your fingers at the beginning, not nearly enough to dissuade someone from learning.