Your not going to learn much, probably going to learn bad habits playing with play money unless it has value like Pokerstars
. I would recommend playing 5nl over play money any day, at least you can learn the game and build fundamentals from there.
When there is no value on the chips there isn't much to be gained. Depending on how serious you are about learning I would highly advise either buying small stakes hm2 or pokertracker 4 and leakbuster. Leakbuster will help you with solid fundamentals and tell you what you need to improve and even has a couple videos on it.