College Student Learning Quickbooks For Side Money?

I’m an engineering major. I recently worked online for a start up online company, but I might not have work for that job for a while. I’m just trying to make some extra money on the side and I’ve been looking at CL for jobs. A lot of jobs involve knowing QuickBooks, filing, and all that.
I think this would be a job that I want. However, I’m just wondering how feasible it would be for me to get a job requiring QuickBooks knowledge if I learn from professional “how-to” videos online. I’m not an accounting major or anything so everything I bring to the table would be straight from these videos. If I really take the time to understand the program, would I be qualified enough to really run a small company’s payroll etc.,. or am I just in over my head?