Where Do I Even Start?

Hi! I work with kids with autism and had this crazy idea to learn to DJ and mashup the kiddos I work with favorite songs on demand. My brain immediately goes to DJing, but I don’t know where to start and don’t know any good resources. I don’t mind investing in equipment, but I’m not trying to break the bank. If anyone has any advice, recommended apps, or classes that have weekend options I’d gladly appreciate your suggestions!