Help brake piston popped out, warning lights still on?!

hey guys

so i had a go at changing my rotors for first time with help of youtube. Well fast forward as i was changing them i saw the black piston thing on ground which popped out of the brake cylinder. Brake fluid was leaking from the brake cylinder but I cleaned it all and the piston then managed to pop it back in behind the dust boot cover. I then kept car off and proceeded to bleed both front brakes using one man kit. I pumped brakes and everything felt fine but now i have a bunch of warning lights that won't got away - BRAKE/ABS/TRC, and another light showing pedals and a foot.

i also purchased techstream online because apparently thats the only way to bleed brakes so not sure if the normal way worked or i broke more stuff. i have car booked into mechanic in 2 days but was seeing if anyone could help or did i just brake my car when it was'nt broken to begin with.

Based on my latest research my only hope is to try techstreaming diagnostics, and maybe perhaps rebuilding the right caliper which had the piston pop out. i test drove car and it stops and i even tried a hard stop and it slammed to a stop. but the warning lights are having me super worried. Ill have a look at the sensors and wires again too maybe something there.