I teach small business owners how to keep their bookkeeping in good order with just 1 hour/week.
I also keep books for small service-based business that need 2-4 hours of weekly bookkeeping.
Share with your personal network, starting with family and your IRL friends when you see or communicate with them next, that you're looking for clients. They know you and actively want you to succeed and will be excited to give a great personal referral to someone they know who needs your services.
Start small with what's available online.
Even with the most careful planning, your business model is guaranteed to morph substantially as you discover exactly where that perfect intersection between what you love to do, people you love to work with, and what you'll be well-compensated for exists.
Opt for "good enough" tools that don't require a big up-front cash layout so that you can be agile if you decide to pursue a different type of client or pivot the business' focus.