Hi Jasmin! Firstly, you must be aware that IIM Bill has been passed which enables IIMs to offer degree. Hence, you need not pursue Distance education at IIM in order to obtain MBA degree. Secondly, as far as the online programmes of IIMs are concerned, those are offered only for candidates with minimum 3 years work experience and moreover, it is not an MBA degree but e-PGP.
Since you would be completing graduation in 2018 and a fresher, it would be best if you pursue full time management programme. Aim to appear for CAT 2018, XAT 2019 and other top MBA entrance exams and get through a top B-School in order to fulfill your MBA dream.