Ive come up with 4 songs, but they feel quite similar in that i always end up play the same sorta chords. Lookin at the tab they rarely include flats or sharps. Should I be thinking on starting a song - itll be based on the C# pentatonic scale or that?
And also I duno how to put minor chords in my progressions because how does that affect the key of the song? is the minor chord the key of the song?

Can a song have no key? If you pick stupid chords like B C C# D D# E, noes that dont correspond to a scale?