Get the controller that comes bundled with the sim. Do some research find out which aspect of the hobby you are most interested in and start there.. Sounds like to me that you're not sure what you want to do... If that is the case BEFORE spending any money go check out a couple of clubs and see if someone will give you an intro flight!!!

Then start doing some reasearch and find out what part(s) of the hobby/sport interest you most.

Places like RCU are a great help IF you can ask a specific question if you can't then most of the responses may be meaningless to you

Example of a Question that is not specific enough "What is the best trainer?"