Hello,
Listen I wanted to tell you a little bit about my personal experience because I think we have some things in common: two years ago I was in a similar position, I studied civil engineering and I wasn't enjoying my job at all. I knew I wanted to program, but you might have notice that the field of programming is huge!, there is web development, software, mobile, games, microprocessors, machine learning, and so on. It can be hard to know what to do or what to study. I asume that you already decided to go deeper into game development and that is nice. Instead of asking in here, I would suggest you to go to the Unity web page and follow the tutorials, you'll get a lot of knowledge from there. Also, there are great youtube channels for learning game dev, I suggest Brakeys, BlackThornprod or Extra Credits. If you are starting with blender, I would suggest the tutorials from BlenderGuru. Finally, if you have any doubts or comments, you can chat with me.
Have a nice day! (and excuse me for my bad English)