Regarding breastfeeding. Vd dis problem.

Hello doctor, My son was 55 days old nd he s not properly taking breastfeeding...I tried in different positions but he s not satisfied and screaming a lot while feeding to me..Relations around me is very strong n mother feed but my son s not feeding...just 5 minutes he s feeding to me...In between that he s screaming...Wat should I do...v r giving Isomil powder by doctors suggestion...Is dis OK to feed powder milk instead of mother feed..Wat should I do to make him feed mother milk..can u pls suggest me vd dis problem...I was very worried abt tat I can't feed him..I tried a lottttt but he s not taking my feed...And another problem I have Oly one side a proper nipple fa feeding another side it's not n proper way to feed him...I m feeding Oly in left side...Wat should I do fa dis also...guide me vd these problems..