How train BJJ at home

I am stuck in between going to a near BJJ gym, or find a striking martial arts gym somewhere else, I am really leaning to BJJ because of convenience, and practicality. One thing that does hold me back and doubt going to grappling instead of striking is practicing at home. In striking you can do cardio, shadow boxing, heavy punching bag, etc. But for grappling idk what to do other than working out and conditioning the body. How do you practice technique?