Sewing pattern for making this dress in the picture.
Sizes 36-42
This dress is made from two parts: 
Tulle skirt
Bodysuit
Video tutorial how to sew leotard part: 
 
https://www.youtube.com/watch?v=rVmUibgde7o&ab_channel=Migl%C4%97Navickait%C4%97
 
Tutorial for skirt:

https://www.youtube.com/watch?v=actMBe0XEf0&t=487s&ab_channel=Soulmatte
 
Here are patterns for the leotard and underskirt. 
The dress is made from two parts that the sewing and fitting would be easier. A bodysuit makes the dress more fitted and comfortable. It's easier to move, it stays in place while wearing. It doesn't go up while dancing or moving.
In this PDF pattern, You will find a Bodysuit and long skirt.

It is very important to choose the correct material for the bodysuit. Use only stretchy lycra fabric. 
For the bodysuit, I used 4 ways stretchy lycra fabrics - nude color.
I cover this fabric with see-through stretchy white flower lace. Then I added more decorative thicker lace on the chest and back.  
For the skirt, I used soft tulle. I sew the underskirt from non-see-through soft chiffon. The skirt has decorative flowy tulle details on the front and back. For more puffiness to the skirt, add extra tulle layers.
The Pattern is in PDF format. 

For a regular A4 format printer. Big pattern, You will need to print lots of pages.
Add +1cm seam allowance.