Hello and welcome. This may seem generic as I just wrote it to answer someone else who had the same question(s)
Notes for a new model. Shoot with a photographer in your area and get some profession looking shots in your port.
The idea initially is to show us who you are and what you look like. We want to see a couple nice head shots, maybe a half body shot or two and some full body shots so we can see how you move and how clothes hang on you.
Show us you have expression, show us you can emote feeling and set a mood. Show us you can pose creatively
Remember, your portfolio is a catalog to photographers. The product your selling is your ability to deliver a look. Show the world you can deliver "your" look