If You are interested in this type of leotard - bodysuit - swimsuit this is the pattern in sizes  XS, S, M, L ( EU  34, 36, 38, 40, 42). 
The Pattern is in PDF format. You will need to glue some details together. 
The pattern doesn't include a tutorial on how to sew, but I have a video tutorial for a very similar sewing pattern (difference in the waist part):
https://youtu.be/mZKqFdOol8c
It was made for a regular A4 printer. 
14 pages.
 Instant download.
Suitable for beginners.
Without seam allowance. I suggest adding 1 cm for seam allowance
It requires about 32 inches or 80 centimeters of the main fabric.