Dear Tony
Every engineering student must go through all the branch subjects at that first year and from 2nd year onwards your core subjects will start. It's good to have that passion towards all groups and it'll be helpful you to achieve higher ones.
All the best.

Dear

You have to choose one branch of Engineering to complete your degree because in 4 years you cannot be expert of all the branches and every branches having own difficulty level.

All the best

1st year the course is same for all branches.....but from 2nd year onwards you will learn only that branch which you had choosed