Hi and welcome.
What helps a lot for gaming, is a better video card, and more RAM. I don't know what the game's min requirements are, but knowing that it's a newer game it's probably way out of your league in terms of RAM. but if you already know what type and size of RAM you need, then go for a better video card. and your not gonna get one for under $40 for sure. your looking more in the double zero range. Good Luck
Edit: you probably won't need a new Processor but you could look into it if you have a full wallet.