I need a little advice on how to make something

hi. i’m now to blender and i was trying to do something new. I was trying to do a fish tail that is similar to this one.

I started by adding a plane. Moved the vertices a little. gave it subdivision and solidify. I’m not really sure what to do now and if it’s possible to make it a little transparent at the end of the tail.

I’m not sure how to proceed now. Can anyone give me some advice, please?

What I did till now is very little. But here is an image

any advice is welcome

You may wanna think about the basic form… Maybe start with simple circle cut in half and select ever second vertex and move a bit like so?:

thank you that was really helpful