Black was clearly playing for influence. To counter this,

should have been played at K16, not at C14.

should be at R10.

should be at N11 to begin reducing Black's moyo, but given the strength of Black's group on the central right side at this point in the game, playing this move at N11 would be something of a gamble.
Black was distributing his stones widely. White should do the same and fight only when there are enough friendly forces in an area.
When playing against someone that plays influence-oriented game, disregard the need to make territory right away. Otherwise, you have an amashi strategy and this can be difficult to execute if you do not know how to make trade-offs to allow you to stay just a couple points behind your opponent throughout the course of the game. Best thing to do is deal with the moyo first, then take territory either directly or through middle-game fighting. Do not let the opponent get a big moyo, which will them be difficult to reduce. Play 2 or 3 points away from enemy stones to prevent the moyo from being consolidated. As well, those that like an influence-oriented game tend to be good at fighting, so fighting skills are needed to deal effectively with such playing styles. This means polishing your skills at life & death, tesuji, and middle-game fighting.
Two pros that are known for playing for influence are Takemiya Masaki and (if I am not wrong) Hon'inbo Shuei. Study their games! For DDKs, though, it's better to learn from pro that tend toward a thickness-based playing style. Two players that do so are Hon'inbo Shusaku and Chen Yaoye. Thickness-based styles are easier to apply and master.
White's opening was a bit weak compared to Black's. I would recommend that the player holding White replay and study a few games by Gu Li, 9-dan pro. Gu Li is known for playing fuseki very well.