I m 12th standard only, also I was in sales field. Due to some reason I left the job. I want to know about hardware and networking sector

I m from delhi, I was in sales sector. 1 year ago my leg was broken in accident. I m unable to work in sales so I m looking for hardware and networking sector. Will you plz suggest which course is best in this sector. I m confused to find good institute, there are many institutes in delhi. Plz help