Like you said, it's all about having fun! :) awesome! I don't use any keyboards, so I can't help you sorry, but I use a piano to get my chords and melodies.
thx Hbeao and 808chunk ...this is easy using what exist alrdy but its fun relaxing hehe :) i will try to get a midi keybord soon hopefuly :) do you use one ? i need to found something realy cheap whit my extreme low budget :)