Where can I read CS papers?
If you have no formal degree in CS, I think what you need is textbook instead of scientific papers.

Being a self-taught programmer is a great achievement and I think you can build up on that with theory. But, reading papers require some deep knowledge in some area. 

I would suggest you to buy one of these books:

Algorithms by Robert Sedgewick and Kevin Wayne  

Introduction to Algorithms by Thomas H. Cormen, Charles E. Leiserson, Ronald L. Rivest and Clifford Stein

Data Structures and Algorithm Analysis in C++, 4th Edition
Mark A. Weiss

In these books, you can also find some references to suggested readings.