You should Not get worries about it, You have a lot of time to improve Just You need to work on concepts and solve as many Problems as You can. It is only two things which will help you in solving the Numerical one is the in-depth Knowledge of the concept ad the other is God Mathematics Skill which You will develop after a lot of Practice, So First just read the concept understand it if Not possible see some solved examples which will help You to understand How to solve the Problems and then start with the basic Problems and then Gradually increase Your level at one point of time You will find Yourself comfortable in solving Those Problems and it is only that confidence which You need to progress so Just maintain the zeal of Hard work till You able to solve the Problems on Your own.