Advice on finding more clients

We recently (accidentally) received a request for an ERP implementation using Odoo. We had played with it in the past, so we got to work, and implemented a manufacturing, inventory workflow for them. Our client was very happy with the results and has started using it. We want to replicate this success with more clients, but have to idea on how to find more clients. I wanted to seek advice from you guys here to see how I can find an adviser / Growth Hacker(?) or if you had tips on how we could do this ourselves ? Thanks in advance.