Bumpy transition to fp&a

I transitioned from tax into healthcare FP&A in October after about 8 years in tax (m&a, and international tax). The move has been more challenging than I expected. My company was acquired a few months after I joined, we've gone through organizational changes, and we implemented a new finance system in January which I got an hour of training on in late dec. Training and documentation have been fairly limited, for example I needed to develop an accrual method for contract labor despite it being an issue for years.

The role itself is interesting and includes a mix of budgeting and forecasting, variance analysis, Workforce and productivity modeling, business partnering with operational leaders. I'm wondering if there is a benefit in staying longer, or if I should aim for a better learning environment.