Identify what you need first. List your concerns from highest priority to lowest to get a sense of what it is exactly that you need from your accountant.

Accounting is a huge profession. Anyone who does anything within the realm of crunching numbers can be called an accountant, and they aren't all specialized in the help you need. Identify your needs, look for a specialist experienced in those needs, and have as many conversations as you need to find a good fit.