I'm trying to model a sculpture ad I've tried using meshes and extruding but I don't have enough knowledge to do it that way yet since I am a beginner. Now I'm trying to use curves to trace it. I've traced the outline but I don't know how to make a mesh out of it because I need it to be round and if I extrude the curve I end up with flat face on the Y axis.
You can draw its profile with as few vertices as possible:
Give it a Subdivision Surface modifier:
Cut in half, give it a Mirror modifier, add edge loops to sharpen some edges, move some edges to round some parts:
Edit: From your current topology, if you want to round the shape and sharpen the edges you need to move some edges and add support edge loops: