Carpet Cleaning-Did I Mess Up?

i read a post about carpet cleaning, how guys are cleaning it using laundry detergent w/ softner.

So i decided to try.

i went to the car wash i brought some detergent and some softner.

i power washed the entire floor on rinse mode.

i wasnt sure how to go about using the detergent, so i filled the cup almost full, and just sprayed it around a bit on the floor, little there, little here etc.

i took a scrub brushed and scrubed the detergent into the floor, it seemed to be getting out the stains and smelling nice so far.

i then put it on rinse and started rinsing, and OMG there was soap everywhere, bubbles, it probably took me what seemed like 30-45 minutes of straight rinsing to get the soap out of the carpet, i probably didnt even get it all, i paid a fortune for the car wash power washer.

so i didnt even do the softner for fear of the same thing happening.

now my question. Did i do something wrong in the process? is there a better way to do it that is "cleaner"