Small Aircraft Maintenance Where Can I Study Aeronautical Engineer? Can I Start My Diploma With Mechanical Engineering And....?

Where can i study aeronautical engineer? Can i start my diploma with mechanical engineering and....? - small aircraft maintenance

I live in Spain, only a small number of universities and colleges offered aeronautical engineering course. Then I wondered if I did not start with bachelor's degree in aerospace engineering and my studies abroad?

Diploma in Aircraft Maintenance Manufacturing Technology
High-tech composite materials for aircraft maintenance
Diploma in Avionics Aircraft Maintenance Technology
Degree in Engineering Technology in Avionics Maintenance
Diploma of Engineering Technology Aircraft Maintenance
Diploma of Engineering Technology Helicopter Maintenance

These are the courses offered at universities, one of which is connected to aeronautical engineering and one is an aircraft mechanic?