Join the fight here: https://lichessladders.com/
You can arrange classical time control games with serious opponents which makes lichessladders a great training resource for ambitious players.
The idea behind the Dutch is to challenge the center straight away by playing f5, thus taking control of the e4 square, and making it very hard for white to expand in the center. The downside of the move f5 is that it weakens the black king in more ways than one. It weakens the seventh rank, and both diagonals looking at f7.
There are several sideline systems white could employ to avoid what black knows best and is expecting. One of these is the Raphael Variation, in which white develops his knight to c3 early on, trying to play e4 and break the center straight away.
https://lichess.org/kvuTFbzN
T239898123291032 (2278?) vs hpy (2193?)
Raphael Dutch
1. d4 f5 2. Nc3 Nf6 3. Bf4 e6 4. g4 fxg4 5. h3 gxh3 6. Qd3 Bb4 7. Nxh3 Nc6 8. Ng5 Bxc3+ 9. bxc3 Ne7 10. Nxh7 Rg8 11. Bg5 Nxh7 12. Qxh7 Kf8 13. Rh3 1-0