The first part of the question can be answered. As you are only 14 years old, you can enrol yourself in a good cricket coaching academy in/near your city to hone your skill. Thereafter, start playing for league cricket in the capital of your state. Work hard, practise seriously and have determination. If you have denuine promise you will play in the sub-junior, junior level of your state and later you can make it to your state team. You will start playing first-class cricket and ODI/T-20 at state level.
Getting selected in the Indian cricket team depends upon your level of development, diligent work of highest order, determination, attitude and to some extent luck.
Age is on your side. Best of luck to you!
"If you are killed in action, you go to Heaven. If you win, you rule this Earth (as beautiful as Heaven). That is why, O son of Kunti, take a firm resolve and fight!"-- Shrimad Bhagwad Gita