I ll suggest you to learn Python ... and

1. Python
2. http://wiki.python.org/moin/BeginnersGuide
3. 42
4. Learning Python - An OSS Book : http://books.google.fr/books?id=nEJ-...um=1&ct=result
5. Use PyGTKEditor to code directly on your NIT.
5bis. Take a look at Glade with python tutorial to make ui as Tinker (TK) isn't available on maemo.