I want to be a civil engineer but how can I achieve that?

Hi! There are many routes you can take. You can study civil engineering in undergrad, and I highly recommend finding internships. Look up civil engineering companies near you, and even if they don't have internships posted on their website, give them a call and ask if they need one. I personally studied mechanical engineering and then shifted to civil during my work years. All engineering relates some way and teaches us how to problem so switching industries wasn't too difficult. Mostly, you have to know what you're passionate about, ask yourself what projects you want to see be built and try to find companies that do that!