Hello Akhil Parikh

I hope you are doing good.

Firstly I would say for achieving something you definately need toi built self-confidence , you should clearly know that if you will work hard then definately you will achieve. Secondly your age is perfect to start studying for sbi entrances , i have seen people cracking post at the age of 25 .

No one is low in any thing ,it just lack of practise , interest and thinking . If you are low in quant then work hard on it comparetively other subjects , first cover easy topics like number system,hcf and lcm , time distance and speed to gain confidence and move level by levell. Similarly for english read the newspapers throughly every day

Hope you found this answer helpful. Good luck for your future