There are florists that are amazing flower designers and they don't have much previous experience _ they possess natural talents for creating beautiful designs and receive positive feedback on their design. There are others that require instruction and training before being able to create fabulous designs and receiving the good feedback. For those who fall into the latter case, the designer should seek out and take training classes as well as locating potential mentorship possibilities. Together these will help the person to enhance their skills and increase the amount of good reviews they receive. Also those in this latter category may do best, at least in the beginning, working in a designer position that follows recipes or formulas.
You may start by placing your foliage that you will use in a water vase. You have to make sure that you keep it around the lips or edges. Stick with the plan to place them the lips or edges of your water vase with a layer of your Foliage. When it is too big or too thick, it ends up detracting from your cut flowers. And if it is small or too thin, visual contrast will not show.