UML to model a specific domain


I am a Graduate Student of Computer Sciences and will be doing as final course work a Conceptual Model of the Precision Agriculture domain, to be used in a Precision Agriculture mobile app.

Now I was suggested to use a Domain Specific Language (DSL) for this purpose, but as I don’t have enough time to develop one, UML is the option that was brought.

Starting from scratch is a little bit hard because I am still a new face in the world of UML, so any suggestions would be much appreciated!
I am getting the specific information on Agriculture from an Agronomist, but trying to figure out how to model the information is very hard!

Best regards,