Setting up a custom Zap to link Pipedrive with Asana

I'd like to create a custom Zap that does the below
- takes information from Pipedrive (including custom fields)
- then adds a task (with named sub-tasks - ideally with descriptions within these sub-tasks)
- this will be added to an Asana project into a particular section within thi

Currently, I can't seem to get the sub-tasks working or figure out how to get the custom fields, which is why I am looking to outsource this part.

Depending on how the project goes we may have a need for further custom zaps to be set-up