Fixed-Price resources

Hello, i'm trying to familiarize with ProjeQtor, coming from multiples other project management software.
Thank you for this hudge work provided on this tool, even if it is not that easy to get hold of the tool.

In the case of a project, I have internal resources, external resources and fixed prices. I do not want to create a fixed price project, but rather manage the mentioned project in its entirety.

For example, how to create the fixed-price resources that I will use in my project. Not creating fixed-price project, but fixed-price resources.
I also need to create tasks/activities that must be carried out both by fixed-price resources and by internal resources.

Other question : i tagged a given resource as "outsourced". How can i exclude it from work to carry out (ie, how can i filter work based on internal resources only).

Thank you for your help.
regard's