D.S.
All I have time to add is this: EVERYTHING takes longer than people think it should or predict that it will. If you're already having trouble staying on top of what you're doing now, then don't expect extra time to magically appear for attending school and doing homework.
Attending just one three hour community college course will take driving time, parking time, walking to and from the building time, time after class to ask questions sometimes, time to go buy supplies sometimes, usually three hours a week of homework (but that's an AVERAGE--some weeks it may be ten hours, other weeks one hour), time to deal with computer and class website dysfunctions sometimes, etc. That's probably more like 8-9 hours on average per week, if you live about 20 minutes away from the college.
I'm not one to discourage anyone from increasing her education, but I do know from the experience of going to grad school as a working mother that it took a lot more time than I had expected (and I'm a realist), and about 10x more time than other people thought it did.