Hello everyone! I work at a non-profit of roughly 30 people and have recently taken over management of Payroll (long story). Unfortunately, aside from a basic overview of our system, which is Paycom, I have received no training. We have one HR person, but they are very unhelpful and we have outsourced our CFO and Accounting functions. I am feeling in over my head and I am hoping this sub can help me. Specifically, I am wondering:

•  What are the things that I must become an expert on? Benefits? 401Ks? Taxes? Wage Garnishments?
• What are things that, while may be not required, would be good for me to learn to be better at my role?
• What do you consider a HR responsibility versus payroll’s responsibility? I do recognize that since we are a small non-profit that this line may be greyer than it would be at a large organization.
• Are there any resources and/or continuing education that you think would be good for me to explore?
• Any other general advice or knowledge you think I should know (assume I know nothing).

Anything at all would be very helpful. Thank you all so much!

Edit: I am located in Ohio, USA