You can pursue mbbs degree after completing your 12th from IGCSE you just need to qualify NEET exam which is the entrance exam of medical colleges.dont have doubt that you need counsellor for this this is just a normal exam as all other entrance examination.if you think that CBSE students has upper hand in NEET than you are absolutely right because most questions asked from NCERT books which is included in their syllabus but that does not mean that students from other boards cannot crack the test. So,start preparing and clear your concepts as you have advantage from IGCSE syllabus introduces students to Indian college level syllabus early and secondly you also have practice of solving MCQ based paper to do well in exam.

ALL the best!!!