5.f4 is a very unnecessary (not bad) move. A simpler move is Nf3, just developing the knight. However it depends on what kind of play style you like and you haven't really shown the rest of the game.
Advice for a beginner
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A few GM games on this:
I want to add that the position after 9.O-O is very complicated. White has a few plans at his disposal, all of them sharp and double-edged. Your plan of fxe5 and an attack along the f-file is not one of them, though. Don't give Black a knight outpost on e5 for free!
BTW, GM Mihail Marin gave this position a detailed explanation, albeit from the Black side, in his repertoire book Beating the Open Games.
Hey guys, I have a question in this position, which I seem to reach quite often. (This was a 5-minute blitz game). I am having difficulty making a plan to carry myself forward into an advantageous position. I ended up playing 10. c3 to stop his knight from coming to d4 where he could pressure the pin on my queen before I forced his bishop away. However, I am struggling to come up with plans that extend beyond the scope of 1 to 2 moves in this position, which I have often. My general ideas are to advance my pawn on f4 and use the open F file that my rook is sitting on to attack his king. Is this correct? Is there a better way to play? After 8. Nxc5 dxc5 he has a weakened center. Should I play less aggressive and a more positional game? While I did win this game, I lose in this position around 50% of the time, and my play was far from perfect.
Thanks for any advice