Dear aspirant,

This is a long process, especially when there are so many choices now. The first and the easiest and the most important step is to eliminate options. Eliminate the options you are sure you are not going to opt for like if you are not  a maths person, eliminate engineering, if you are a math person, decide if you are a physics person or economics person and then again eliminate engineering if the answer is economics.

If you are more into creative field, choose whether design or architecture what you like the most. Search for the work profiles in these fields, see if you like them, and proceed only if you think you want to continue in that direction or not.

Hope this helps. Thanks.