The way I see it Step 6 isn't something you can do it is simply the result of progress made in steps 1-5.
"Became entirely ready to have God remove..." is a crystallization of the work done in Steps 1-3. In these steps you recognize your powerlessness, you recognize a Higher Power and you submit your will and your life to that Higher Power. The submission eventually reaches "entirely ready" proportions and the powerlessness and Higher Power aspects point to the God removing part.
"...all these defects of character" are found in steps 4 and 5. Through inventory and admission and review of the exact nature of these things the defects are clearly isolated and understood and the heart can understand the reasons for their existence as well as the reluctance to let them go (ie, not being entirely ready).
Except for the part in Step 5 where admission is made to another human being, all the work is between the person and his/her Higher Power. The other human beings are most appropriately the sponsor or peers in their program at this stage. Steps 9, 10 and maybe 12 get to involve you in ways that shouldn't be capable of causing further harm.