Before CompUSA folded, my wife was a software instructor there. They would teach one-week courses for all of the MS Office elements - Word, Excel, PowerPoint, and Access at $150 per course. They had other courses but she only taught Office utilities and Windows Beginner and Intermediate.
It was the best investment I ever made because when we got married, she said she wanted to learn more about computers. CompUSA had a deal where if you bought an $800 membership, you could take any class on the curriculum that was on the schedule during a six-month period. Break-even was six courses. She took 24 courses in 26 weeks and got so good at it that they offered her a job. So the next year, her income exceeded the cost of the courses AND she got a job where she had the chance to talk to people all day and tell them how to do helpful things. It was right up her alley. She used to come home stoked about how good it made her feel to help people in groups like that.
Back then, certain utilities were not considered major elements of Office though their lineup has changed a bit in 14 years. CompUSA had beginner, intermediate, and advanced courses for all of the Office programs. However, sometime around 2006 or 2007, they folded and lost their brick-and-mortar presence. They still exist online for hardware because Tiger Direct bought them out. Apparently they wanted name recognition.
@vhung, I think your best bet is going to be one of the business colleges or commercial computer learning centers. But with this corona virus, you might face on-line learning anyway.