first exercise!

- create exercise vec statistics calculator (shout out claude)
- finish hacky solution (it works... but at what cost)
- update current state

CURRENT_STATE.md

@@ -1,9 +1,9 @@
 # Current Learning State
 
 ## Position
-**Book:** Rust Book (Brown University edition) - Chapter 7 (Modules)
-**Status:** Ready to start Module exercises
-**Last Updated:** 2026-01-12
+**Book:** Rust Book (Brown University edition) - Chapter 8 (Collections) ✅
+**Status:** Ready for Collections exercises or Chapter 9
+**Last Updated:** 2026-01-14
 
 ## Recent Concepts Covered
 - Variables and mutability
@@ -12,6 +12,8 @@
 - Ownership and borrowing
 - Structs and enums
 - Pattern matching
+- Modules and privacy
+- Collections (Vec, String, HashMap)
 
 ## Current Understanding Level
 - **Ownership:** Ambivalent (normal at this stage) - needs more practice