That's about right but there are more ways water interacts with other elements. Water is highly conductive so it helps to use lightning in combination with water jutsu. When fire heats water to a high temperature it evaporates creating steam which is also a KG. And when you saturate earth with enough water, mud is formed. Now that you have enough info we can move on to jutsu. Feel free to ask any questions you have.
Since you've never molded suiton chakra before try acquiring a strong mental image of the nature of water (a description of water's characteristics) and mold a portion of your chakra to mimic that nature. Then channel suiton chakra into a water source and manipulate it with your chakra to create a small wave. After that, try raising water in the form of a small wall and then shooting a small water blast from the water source. That's the basic suiton jutsu. It could also be done without a water source by converting suiton chakra into water released from your mouth, hands, etc. When you're done with the first three try it without a water source.
(Suiton No Jutsu) - Water technique
Rank: D
Type: Supplementary/Attack/Defence
Range: Short-Mid
Damage Points:20
Description: Creates small waves of water,small blasts, and small shields of water.
Note: Doesn't require a water source but can be used to manipulate existing water.