If you meant Information Practises when you said IP, it helps you understand Computer software, database, coding, etc. You will get to learn JAVA, HTML, Software languages, etc in this subject. How you perceive a subject to be difficult or easy depends on your preparation and interest on that subject. This is completely different to Maths. Having said that because IP and NEET are 2 different subjects with different outreaches, you cannot compare them. But selecting IP in a way is much easier than selecting a core subject like Mathematics for the amount of practise it needs. This doesnt mean that IP needs no practise. What you will learn in your 11th or 12th will be easier than what you learn at a Graduation level. So you can select IP as an optional subject and still prepare for NEET. If you are preparing for NEET 2021 or beyond, luckily for you the syllabus for NEET is being revised and reduced which means that the burden is going to be lesser. So sticking to NCERT and following every day's syllabus religiously will help you get a seat in MBBS.