First off, you don't develop homebrew for ChickHEN. ChickHEN runs standard homebrew provided it's not in the 1.50 kernel.
Second, have you had any coding experience before? If not, the PSP isn't a good place to start. Preferably, you should start with the PC into a simple language like LUA. Dropping into C++ or C which most PSP homebrew is coded in isn't a good idea.
Here are some tutorials for the PSP in specific:
LUA.
C.
thank you for advice.
i had learned C in the university,
and programed some application for my work now,
but just on windows.
now i am learning Lua.
i found it every easy for beginner .