Hi and welcome to just answer.
you need to start with the furthest away choose any of the rear ones then the opposite side on the rear then the offside front then nearside front.
Use some lubrication on the bleed nipples they are not suppose to be over tight but you will find they sometimes nee a bit of elbow grease if they have not been undone for some time .
they do not need to be totally removed just a turn or two.
please make sure the reservoir is topped up through the stages otherwise it will mean starting over again.
if you need anymore advice please reply .
thanks in advance for your feedback.