In order to get a b1 or b2 license , you have to complete the basic training in a part 147 approved training school , then do 2 years of practical training and get an approrpiately licensed part 66 B2 or b1 engineer to sign the tasks that you had done for you in your cap 741 logbook ,the duration will vary subject to coverage of the cap 741 requirments.
in order to get a dispensation from the basic training and go straight for the exams you have to have 5 years of working experience in a part 145 approved maintainance organization and have a brochure that proves such a fact with signatures of appropriatly part 66 approved engineers.
So , what i would do in your situation is , go through the basic training and then get involved in my own aircraft maintainance and get the engineer whom i helped in maintaining my own aircraft to sign my cap 741 logbook for me , and then once i cover all the requirments of the 741 , submit my papers to the competent authority and hope myself all the best :P in getting my papers accepted and obtaining my B2 license.
I hope this helps