Hey there -

You sound like you're doing great.

You could try a three-day split that would be legs, shoulders/chest/triceps, back/biceps if you like. I like a 4-day split, because it's shorter at the gym, but I think I would personally draw the line at a 5-day - you need time to rest and grow.

I don't like to do more than 30 minutes of moderate cardio on lifting days, and even then, only on non-leg days.

Alternative splits:
shoulders, back, hams
quads, calves, chest
biceps, triceps, cardio

Break it up whatever way you like. You'll have to change it after a couple of months when your body gets efficient at it anyway. If you think your body is going to respond in a certain way, well, nobody knows your body like you do - experiment.

And have fun with your progress!

- Built