Mechatronics comprises a ton of different areas of study, it combines elements of mechanical engineering, electrical engineering, software development, structures, etc. On it's own, you'll likely find that you become a "jack of all trades, master of none" for those specific disciplines, but thats totally ok. I myself had a mechatronics focus in university, and one of the most useful conversations I had with an advisor was about what part of a project I liked the most? If I found that I really enjoyed going into a machine shop to make parts, or enjoying doing CAD for prototypes, Mechanical Engineering was a good field for me to focus on, and had I chosen to pursue that I likely would've found jobs in that field. Alternatively, if setting up the circuitry and wiring was the part that appealed to me the most, Electrical Engineering would've been a better field for me to pursue. In my case, I actually enjoyed the aspects of programming the most, and so I ended up with a focus field in Robotics, and parlayed that into roles in Data Science and Machine Learning (which doesn't actually relate a lot to Mechatronics). All of this is to say that mechatronics itself as a study field gives you a lot of exposure to different areas of work, and for that which you decide to spend the most of your focus/energy, you'll likely have a solid skillset to get a role in that area. Alternatively though, you can stay a generalist and find roles more specific to the field. From what you've said about liking computers, it may be that the programming and/or electrical engineering side of things is a part that you'll likely find more enjoyable, but also don't discount how your feelings and pursuits will change over time. I started out interested in political science and aerospace engineering when I was in high school, and ended up in a totally different field. Cast a wide net to start and get exposure to a ton of areas to see what you like the best!
I typed "mechatronics" intothe search engine of my PC. I recommend you do the same. You will find all sorts of descriptions of the job, job offers ( so that will answer a lot of your question). You will also see URLs for different colleges that offer courses in this area.
Just about any machine or device that you can think of uses some combination of mechanical parts, electrical and/or electronic parts, and software, etc. to do its task. An automobile is one example. The assembly line to build an automobile is another. The printer that prints this page is yet another.
So, there are lots of things in this world that need engineers to provide answers to " make it better"; "make it less expensive", "make it easier to use"" and so forth. Mechatronics is just one path to that goal. Good luck Ruben.
Mechatronics Engineers have career opportunities in the following areas.
Manufacturing and Process