I have just completed my first year in mech engineering. Where can I get an internship for 1-2 weeks

@Pranav‍ - You'll have to browse through websites that list internships. However, I'd recommend seeking a longer term Internship. Two weeks of internship won't really matter in the jobs market. 

Plus, the chances of getting recruited in a company where you complete your internship are way more than cold-applying to companies. All the best!