As a Metallurgical Engineering second-year postgraduate at University of Science and Technology Beijing, I am eager to gain practical experience in my field .
I am not sure if I should try to find an internship this summer.
That will be fine because learning all along without any practical experience isolates you from the reality. Every educationist needs this and wish people with such experience on how to gain job on educational technology should share the periodically.
In addition to the given recommendations , does your school have a Career Services Office? Do they hold virtual or in person job and internship fairs? Attend those!