Hi @Kynan369 and welcome to SimScale! 
First of all very cool model! Well done! 
And yes, you can do a FEA analysis with assemblies.
You can have a look at our Drone Workshop which covers FEA as well as CFD analysis just for the sake of demonstration and in order to get familiar with the User Interface.
As far as I have seen, your model looks symmetric. That means you could only use a quarter of your model and apply a so called Symmetry Boundary Condition on your model to save some core hours and pre-processing time.
You can also have a look at the nice project from @ahmedhussain18 if you are interested in doing a dynamic analysis. Have a look at the project spotlight: Drop test of a drone
If there are any questions from your side, feel free to ask!
Happy SimScaling and good luck!
Jousef