Curved area

I need advice of how to draw curved area

You could use the Solid Tools - Subtract tool to do something like this:

is there any link or vidio explian that one,its very near what i need

Good topology for Subdivision Surface modeling and UV mapping with all quads

Extensions: Vertex Tools, QuadFace Tools, SUbD, FredoCorner.

Can yu pls share vidio from beginning for drawing the cured area

I’ve given you the terms you can use to search on YouTube, you will find a lot of tutorials.
It takes time and in-depth study to learn to model with quads, not just one tutorial.