I would probably do bad in online studies, because I need schedule... I still do many things right before the deadlines... but that is just my laziness.

Nevertheless, try to set yourself a schedule. Try to do as much as you can. Try to work on it each day. If possible, take extra time, if it isn't too costly. Can you afford an extra year or at least a semmester, to spread your credits in?

And I recommend reading some "how to study" tips... Maybe finding more effective ways to study (everybody needs a different route, but it's worth exploring the options) will make it less stressful.

Don't beat yourself if you don't do as much as you want... but on the other side, don't cut yourself too much slack...