Your postings here don’t read like machine translations, so if you haven’t devoted hours and hours preparing them word by word, I’d say your English is good enough or at least very close to it.
There might be some differences in the meaning of the term “engineer” between us. In the US and Europe a mechanical engineer is someone who has broad training in materials including fatigue, structures, dynamics, thermodynamics, hydraulics, some electrical and electronics, etc. Their duties in a large company usually consist of system design and integration, component conception, test design, etc. They coordinate and supervise CAE designers and analysts and test technicians as well as the downstream users of engineering information in purchasing and manufacturing. They work closely with the suppliers who manufacture the parts and assemblies within their scope of responsibility. Any specialization such as you refer to in “printing” comes about while they work for a firm in the field, rather than in their academic training. In the US and Europe a degree with a detailed specialization would usually imply training as a manufacturing or customer support technician, rather than a degreed engineer. While not required for working at a large auto company, many engineers go on to receive professional certification from the state. Many others attain master’s degrees. Some in my company who did structural analysis had PhD (doctorate) degrees.
If your main joy in life comes from actual part design, your engineering training would be a definite plus, but is not normally required for those working as CAD designers. I would think that it should be relatively easy for you to find a firm that supplies the auto industry and uses mainstream auto industry CAE software to hire you in an entry level position where you can learn the system.
I could suggest that you contact Dassault and Siemans to find out which software is widely used in your area and maybe even which suppliers are using it.