Mad_Cyril If you arent playing out to a crowd, then just get creative for now, play tunes that you think sound good together, get involved with interesting transitions and the like, worry less about the key and aim for interesting. You can worry about the key stuff once you start to get a bit more advanced or ambitious. Remember, you can pitch shift tracks if you need them to fit, but things like chord progressions, bass lines, miss matched percussions, clashing vocals etc can stop two tunes going together as much as key.
