iam doing b.com from du and preparing 4 mba but i dnt think i wil get a gd percentile in CAT i dnt want to waste my 1yr what should i go 4

iam in my 3rd yr and as per my preparation i dnt think i wil get a gud clg. i am thinking of doing diploma in event management or some language course but at the same time iam thinking of doing an job to contribute in my higher education