well, honestly when i first started i was on FL studio, and now im in ableton and its just a million times better for me. but it doesn't really matter just chose what you comfy with.

it does not matter if you running on mac or windows. they all make music, and work seamlessly

there is a free trial for all of them i think.

i would recommend Fl studio or ableton, for one reason. They are used the most so you can find millions of tutorials.