You plan to invest $2?   I dont think you should bother really. You will pay fro transaction fees. Every bank will take $2 from you when depositing to any exchange.  Only way and even that is hard is to buy #2 crypto from a friend of yours you give him $2 and he sends you whatever coin he have.   

Why dont you gather some money and then start?  You can also earn it if you have some knowledge and free time. Or sell something for crypto that you dont need.