There is nothing in this world that I can recommend more than Burne Hogarth’s Dynamic Anatomy. This is the single most important book I have read for my artistic education. Read it, copy it, or whatever you have to do, but it will change how well you draw.
The head and neck are too small for the body. Also proportionally, thighs are almost never same size or larger than the waist. There are some incredible old school art books that teach about proportion and anatomy, it'll make drawing figures much easier for you. https://www.amazon.com/Dynamic-Anatomy-Expanded-Burne-Hogarth/dp/0823015521
Unclear without context how long you've been drawing, but, good on ya for posting! A couple of bits of crit:
Have you read Hogarth's Dynamic Anatomy? (US Amazon link, but I'm sure if you sail the seven seas you can find PDFs). Was very helpful to me as a teenager trying to figure out drawing bodies, even without life-drawing classes.
Your colors are all really saturated. I still have to fight this today. Part of that's a stylistic thing (your face style says "anime/comic" to me so full saturation is less of a deal?) Maybe try experimenting with slightly lower saturation though and see where that takes you?
Your colors also don't seem to be picking up any of the blue light from the water. You might want to look at some photos of underwater dance to see how the lighting is. Again, I think you're going for a more stylized manga/comic illustration look so you don't have to lean in so far to that, but it might be helpful!
this website contains a lot of pdf's of out of print how to draw books that do a lot of work in teaching fluid sketching. you can find more of them by going through the name of the series and get a download of them for free.
burne hogarth also has one of the best anatomy books and dynamic anatmy books ever made on amazon it was the base line for the creator of spawn todd mc farlan to develop his art stlye.
this website contains a lot of pdf's of out of print how to draw books that do a lot of work in teaching fluid sketching. you can find more of them by going through the name of the series and get a download of them for free.
burne hogarth also has one of the best anatomy books and dynamic anatmy books ever made on amazon it was the base line for the creator of spawn todd mc farlan to develop his art style.
here would be an example of the art style I was able to develop thanks to them.
read this: Dynamic Anatomy by Burne Hogarth
Start with a pencil and large drawing pad. Get the cheapest you can find because your drawings will be garbage. You need to learn the basics that you think you already know. Drawing an egg with a good shadow is tough.
Intro to drawing https://youtu.be/ewMksAbgdBI
Figure drawing book https://www.amazon.com/dp/0823015521/ref=cm_sw_r_sms_apa_i_TummFbARSCP2Z