Go to tab “Sharpness” (black & white triangles) and set following values – Luminance: 30, Luminance Detail: 50, Color: 30, Color Detail: 50, Color Smoothness: 50, Amount: 20, Radius: 1.0, Detail: 25 and hit OK to apply changes.
Let’s go back to the background. We will clearly see where our main character, and now you can remove unwanted parts in this image. Create a two new layers (“Create a new layer” icon on a Layer panel or Layer > New > Layer… > or Cmd/Ctrl + Shift + N). For a first layer set Blending Mode to “Darken”. Take a Clone Stamp Tool (S), set Sample: Current & Below, use water as the clone source. Change stamp size depending on the details that you want to remove. On “Darken” layer remove the water lilies near the model (several groups of water lilies in the foreground is better to leave) and on “Normal” layer remove texture of bubbles. Arrange the layers as shown below.
The next step, I added new water lilies. Open image “water_lily_png_by_mariasemelevich-d8qe44z” and with Lasso Tool (L) select leaves of water lilies. Move it into working document with Move Tool (V). To keep the image quality I suggest you convert this piece into Smart Object (right click on layer > Convert to Smart Object or Layer > Smart Objects > Convert to Smart Object). Reduce it’s size by using Free Transform Tool (Cmd/Ctrl + T or Edit > Free Transform). Everything else is to your taste and wishes. You can arrange the lilies where you want. To make a larger number of lilies duplicate it (Cmd/Ctrl + J or Layer > Duplicate layer or hold Opt/Alt when use Move Tool (V)) and flip it horizontally (Edit > Transform > Flip Horizontal).
Do the same with flowers of water lilies. In the image below you can see how I placed water lilies. Try not to overdo it and create a harmonious arrangement. The lower right corner of the lilies I do not do, because in that place there will be a plants bush in the foreground. When you’re happy with location. Select all the layers and will integrate them in a single layer by selecting layers and hit Cmd/Ctrl + E or go to Layer > Merge Layers/ Layer > Smart Objects > Convert to Smart Object.
Background ready and now we add depth of field. You will integrate all layers into one (except model layer) and work with it (Cmd/Ctrl + E, then convert it in Smart Object), or create a merged copy (Cmd/Ctrl + Opt/Alt + Shift + E) and convert it to Smart Object. I used the second method, in case you suddenly need to make a change in the overall composition. Now the depth of field. Go to Filter > Blur > Gaussian Blur and set Radius: 5.5 pixels.
Select Smart filter layer mask, Take a Gradient Tool (G) with default black & white gradient, Mode: Linear and gradient on it, roughly from the bottom to the waist of a model.
Add the main spot of color. It is necessary to focus the viewer on the main character. Add adjustment layer “Gradient Fill” with following gradient #020202 > #3e2d56 > #816e8a > #c4b3c7 > #ecdaef, Mode: Radial, Scale: 200%, Reverse. Set Blending Mode to “Soft Light”, Opacity around 72%, Fill around 73%.
Create a new layer above gradient layer and set Blending Mode to “Soft Light”. Take a Brush Tool (B) with form: soft round, Opacity: 30%, color: # 19294a. Brushed background trees in the left – center side of image.