Both the CV 1.9/28 and the last Leica 2.8/28 before the 2/28A are great. (The 2/28A even more so). The last tabbed 50 Summicron (called version 4) is a gem. Be patient about buying and shoot a lot. Thus you learn about your needs, dislikes, etc. Your experience will become *very* valuable next time you got the money to go and purchase more gear. Buying the wrong items for your needs is by far the most expensive aspect of buying photo gear...
And yes, above all: enjoy!