After white plays 1. f4, the first question is what should black play? There is plenty of room for disagreement. Each of the following moves are playable: d5, c5, Nf6, g6, d6 and the provocative gambit e5.
Now back to the main question - what does white do on move 2 and beyond? White can choose from at least three major setups against most black moves. First, white can combine the Bird's Opening with Larsen's Opening. His next moves are most likely b3, Bb2 and Nf3. Second, white may choose the Stonewall Attack. Now he would continue with Nf3, e3, d4 and Bd3. Finally, there is the Fianchetto or Leningrad system. White quickly plays Nf3, g3 and Bg2.
Alas, the From's gambit 1. f4 e5 requires more careful treatment. If you prefer sacrificing a pawn instead of accepting a gambit, then e4 transposes into the King's gambit. However, real Bird players will grab both the e5 and d6 pawns, then develop with Nf3.
Good luck!
I am quite confused about this. I did not know what the best move was here, I wanted more information,
so I thought somebody would know the best move.