I think the difficulty can vary depending on the courses you plan to take. That said, I think it's doable to take mulitiple courses in the same semester. Personally, I took five courses from the EU, and in my opinion, they were not challenging at all. They only lasted 8 weeks, so the time flew by. I took two courses per semester while working, and I managed just fine and got all As.
In Progress
Georgia Tech OMSCS
Enrolled: 01/2024 (2 down, 8 to go!)
Completed
TESU BA Computer Science & ASNSM Mathematics
Conferred: 09/2023
Excelsior University BS Psychology
Conferred: 02/2023
Georgia Tech OMSCS
Enrolled: 01/2024 (2 down, 8 to go!)
Completed
TESU BA Computer Science & ASNSM Mathematics
Conferred: 09/2023
Excelsior University BS Psychology
Conferred: 02/2023