Please help, thank you?

hi, i have a bachelor degree in economics and i recently did my MBA degre in finance.so, i get involded in accounting business as a purchase ledger in london. but i would like to develop my accounting backround. at this point ,i am in two minds whether AAT or CIMA study is proper for me. to be honest i have no strong accounting information, and should i study AAT first then CIMA or cos i have strong math competence, or CIMA is the right choice to start.