Agreed, cs231n is a great course. For neural net information less specific to computer vision I would also recommend looking up video lectures from Nando de Freitas and/or Hugo Larochelle.

I also have to put in a plug for Geoff Hinton's Coursera course. It's not for the faint of heart. It's essentially a graduate level college course with the commensurate required time investment. It's getting a little old now but it was my introduction to neural nets and if you want to learn from a pioneer in the field it's still a good option in my opinion: https://www.coursera.org/learn/neural-networks