Cardio is a nice way to start the morning, man. Whether you sit on the bike for half an hour or throw on two jumpers and just sweat, it’s good to get up, get the body active, put on your headphones, and just pedal away.
If you do cardio one day and the next day you can do weights, do it that way. If you need to do it at night or in the morning, do it that way. Whatever you need to get it done, just get it done.