I wouldn't say that was a place to start programming. That is more like a way to get into the open source community.
A great place to start for open source projects is SourceForge.
Three big open source projects are Firefox, LibreOffice (formerly OpenOffice) and (of course) Linux.
Learning how to program is something else, what is your current level (ie. what can you do now?) and what do you want to do?