How does a one get become a investment banker he/she as a pcm Student

First things first, if my flair is wrong, please say so politely so I could change it. I don't want to get hate for it

Starting:

So....hi everyone. After spending my 11th grade in an existential crisis, searching for meaning in my monotonous life, I realized that engineering isn’t for me. I chose PCM like many Iindians...because of parents *sigh* but I don’t blame them; prolly a canon event for me. I’m a dummy student and have been studying with PW. Recently, I started developing an interest in investment and business, due to some novels and shows. This led me to the web to research more, thinking that if I was seeking some novelty, I’d get over it. But I was wrong...I actually kind of like it

I will finish this, not wanting to take up more of your time people, my goals are: getting a job as an investment banker and searching for a uni abroad (as I read some guy saying, 'If possible, choose to go abroad to study finance in a top university, as it can give you a boost, and having a scholarship is a big relief')

The thing I have the most of now is time, so if I can get a roadmap, it would be a big help I will start my 12 in June . An additional fact: I have psychology as my additional subject because I thought it was interesting.

my_qualifications (as it stated in the reminder): 80% in 10th boards *11th me dummy school walon ne bulaya hi nhi and said its not neccesary*

*I posted this one in r/Indian_Academia but they ask me to post here*