Yes, this could be the best time for internship. Amazon offers internship to people of 3rd year also. You will have to qualify the selection process for getting an Internship. You must be well versed with Programming, Data structure, Networking and Operating System.
Once qualifying a online test you will be called for Interview, the interview can be broken down to 3 parts, Technical, Technical and Managerial (also a technical interview).
All the best.