Not sure about order management, but you should check out seopanel.in - it's a free, open source SEO management dashboard that you can setup on your own hosting. It's not very user-friendly, need to get used to it but it does track everything nicely.

Depending on how you want to manage your orders, you can use something like WooCommerce that will be integrated into your WordPress-powered marketing site and allow you to do ecommerce functionality for simple ordering.

Feel free to request a call about either platform or both. Depending on your budget, I can recommend few other SEO platforms I've worked with that are premium but very good.