Adding a bit to ntnlbd's answer:
You can either have the main, top-level nav in the navigation drawer (the hamburger menu) and the secondary stuff in a linear hierarchy
Or keep the tabs and use the linear hierarchy together with a preview of the dashboard (similar to what ntnlbd meant with cards)
Or anything else that clearly separates primary and secondary navigation.
The point is that the top level navigation has to be very clear to the user and he always has to know in which one he currently is. Notice how I used the app bar in the first example to always display the chosen category.
You'd have to be careful here with the linear navigation, as you need to visualize the path the user has taken to get here. Something like breadcrumbs:
There also has to be a clear distinction between primary and secondary navigation. As Google shows well in the following image, using too similar looking elements results in confusion.
You have 2 top categories and a handful secondary categories, visually that means that the secondary ones have to follow after the primary selection. The user expects the process to be like this:
In your case having the secondary navigation in the hamburger menu would be like the opposite in the user's mental model, choosing the primary on the second level and the secondary on the first level.
Further reading: Understanding Navigation by Google
Just make sure to follow these basic rules and I'm sure any design you come up with will be understandable for your users.