Amazon AWS and Android

Amazon AWS and Android

How to connect to it all?
After doing a bit of research I am still at ground zero. I would like to
implement certain functionality in my Android app that would involve user
interaction such as; Comments, Invites, Pictures, Listings, Friends Lists,
etc.
The AWS that I have looked into would be the ELB, EC2, S3 and RDS. I
cannot seem to figure out how I would communicate with those services from
my Android App to enable me to submit certain queries associated with the
database, or store photos using S3.
I see Amazon provides and SDK that allows for some interaction between S3
and DynamoDB, however, I believe my table structure would be to complex
for a NoSQL DB.
Anyone have any luck as to how I can relate all these services together? I
feel like I have been given the right components but lack the information
to actually make them work.
All advice is appreciated, and thank you!