Discs are easy to fit too, as long as you don’t have trouble taking the bolts out
If it’s a Honda, they reckon that you should replace the disc bolts whenever the old ones are removed (I never have, though)
Don’t use copper grease on the disc bolts - just a dab of threadlock.
For the indicators, you’d be best buying and fitting a constant rate flasher unit in place of the original. That way, any type of indicators can be used, and if necessary, they can be swapped out for a different type at any time without changing the flashing rate.
Fitting resistors can be a pain, and introduces more points of possible failure.
Pads/Disc are dead simple to do. Literally a reverse of taking them off… Electrics, I pay someone else to do that! I’ve done pads/discs on 3 bikes with no issues at all.
discs/pad piece of pi55 to fit etc, be aware though you will prob have to rebleed the brakes, if new pads are thicker than old you will have to push pistons in a bit to get em in/over the disc.
will be some1 on here that can help, where you based?
connector thing, try halfords am sure they stock some or j&s, hein geriche.