Hello, or as we say in Sweden where I now live, Hej
There are several ways to become an aerospace engineer. Some students take an undergraduate degree in aerospace engineering. There is a program like that at my university, Carleton, in Ottawa, Canada. Other students choose to take an undergraduate degree in something like electrical or mechanical engineering followed by a master's degree in aerospace.
Some do an undergraduate degree in aerospace and then a graduate degree in aerospace or a graduate degree in some other appropriate engineering field. Don't forget about the possibility of doing a PhD as well.
A good place to start is to ask yourself what kind of aerospace topics are you interested in studying. Perhaps you are interested in how wings are shaped or how the fluids move in a gas turbine engine or what materials are used. Perhaps you are curious about how the electrical and computer components work with the software that together control the wings and the engines. Perhaps you want to understand how rockets work or microgravity or how people live in space. It is a huge field with lots of interesting and exciting developments.
Engineering is a global business and, in many instances, your educational qualifications can take you and your career, around the world. Of course there will be challenges and issues related to whether or not your degree (or degrees) are recognized. Check to see if the school you are interested in, is accredited. There may also be challenges with other things. Education and career experiences are one thing, getting a driver's licence in a new country, for example, can be entirely different!
Best wishes or Hälsningar