See as you are mechanical engineer, it can be tough for you to get internship online for your field i.e., Mechanical Engineering. But you can take other internships such as Content writing, Subject Matter Expert, Coding (Python, C++ etc), if you know web development then also you have good options available etc. Thus you can do internship but for a ME related internship you have to find hard as ME is a field where on sight internships are more available. You can search Internshala and such platforms for Internships and I am sure you will get any as per your interest.

I hope this answer helps. All the very best for your future endeavors!