Get a loner tool from autozone which has a reservoir you hook to the MC and fill with fluid. A bottle you hook to break caliper. Simple following the instructions that come with tool and you can do a one person fluid change. Just make sure the MC doesn't go dry

The fluid is in fact hydrascopic (sucks water)
and if ignored, long enough the the water in the fuid
starts corroding all parts,
think about abs modulator damage and the price of just that.?

there are many ways to bleed the system.
gravity bleed, (useless and risky on abs)
2 man (free of cost, cept the wrench to bleed it)
front pressure bleed.
rear vacuum hand pump bleed.
rear reverse pressure bleeding.
what ever you do , avoid adding air to the upstream end.
(like letting the MC go dry, )

find a real ASE shop and get a non crook to do the job right.
and win.

there is no best way, with tools, each has pros and cons.
but the 2man is safe, at each caliper. MC kept full.

do you need a book on bleeding
there are 1000s in print, from 100 year ago to now.
no lack of facts in print.
then read the pitfalls in ABS> learn what NOT to do , is best.

google 2 man bleeding,
like 78million hits.

Diy brake bleeding kit form an auto parts store
or do master first
but keep a little of the old fluid in so air doenst enter the lines (soak up a bit with a clean cloth )
use a stick jammed into the seat to hold the pedal down firm
bleed the fromt
crack open a litte
then reset the stick
do the back
top up master

No reason to do this if you don't have a problem with the brake system. Brake fluid just doesn't go bad. Just because the fluid is a little dark and the reservoir is black, doesn't mean the fluid is bad. The shop I just quit would charge $70 for a brake fluid flush. All the did was pull the fluid out of the reservoir and fill it. $70 for 2 minutes of work and 3 to 5 ounces of fluid. This was just 1 of many things they did to rip people off.