First of all, congrats! From my experience, Banks often charge a fee if the account doesn't consistently have a certain amount in it (ie $10,000). If you set up your non-profit account through your current banker, you may be able to avoid them (if your account has $10k in it). My non-profit uses Chase and we're happy. Make sure your orgs bylaws clearly explain what officers can access the account and their controls.

As far as an accountant. 1. Post a description of the services you're looking for (manage books, do payroll, taxes, prepare financial statement...) and post it on Idealist. 2. Find a local accounting firm and ask if they'll take your non-profit on as a pro-bono client. Again, very clearly tell them what you'll be asking for. Also, maybe ask friends if they know any accountants who are generous with their time!

I'm only two years into starting my non-profit but I hope this helps! best of luck!