Not sure if this should go here or under General Instruction, so if i get it wrong, apologees

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Well, I'm just having a little trouble with working with odd time signitures and singing at the same time (which i sometimes do in the band I'm in)... and it only gets worse when playing trying to play over four. (by which i mean play like 5 equally spaced notes over a bar while everyone else is playing four four)....
And ways i can get used to it...
Should I practice the bass part whilst sleeping, so i can consentrate on the vocals or vice versa or what???
Need help!
