Will we talk about more complicated uncertainty propagation in the future?

Well, a lot more detail would be getting a bit off topic... but here are some references and links if you want more information:

• A basic tutorial
• Another link with introductory error analysis
• Data Reduction and Error Analysis for the Physical Sciences, by P. R. Bevington and D. K. Robinson: this one is a classic, and I recommend it as a general reference. If you get one book on error analysis, get this one. Watch out for typos, though, even in the second edition.
• An Introduction to Error Analysis, by John R. Taylor: Another classic, at a somewhat more elementary level than Bevington & Robinson. This is a good one to go through if you feel you lack background.
• I teach a mini-course on error analysis occasionally.

For the purpose of this course, the basic no-correlation error propagation formula is the most important thing to know.