there's a lot to do.....
u can do a major brake service which take out ur caliper change the oil seal inside....
cuci the piston inside, change the master pump kit, bleeding....
while the brake caliper is open u better check ur rotor disc both side whether in good condition or not...
if preety bad the rotor disc need to be skimmed...
after skimmed disc make sure ur existing brake pads are also canai back to even the surface..
usually it will take two days for brake to makan aka bind to the disc..
cross drilled, slotted or watsoever is gud but will worn out ur pads....
steel braided hose is gud but there is a cheaper ways which required a lot of cable ties...