About choosing a DAW... there are so many to to choose from out there... it is a matter of personal choice and preferred workflow... Pro Tools is not the best choice in my opinion, there are many which is better: Reaper, Cubase, Ableton, FL Studio and others.

About "sounds": There are plenty of good and free options to start out with - here are a few to start you out:

Komplete Start will give you plenty of instruments and sounds to start out with:

https://www.native-instruments.com/en/products/komplete/bundles/komplete-start/

LABS from Spitfire is also free and a very good sounding collection of instruments:

https://www.spitfireaudio.com/labs/


Will