Hello Harsh, The ranking in JEE Mains does not solely depend upon marks in the JEE Mains Examination. 40% marks of your qualifying examination marks are taken into account while preparing the Rank list.
However 150+ is a decent score but you have to take into account your qualifying examination marks to predict your rank. If you score more than 90% marks in say CBSE examination then for sure you can get a good college.