Welcome to trying a role playing character.
The first step is to decide what AT you want. I like getting in close and fighting, but I like being with groups, so I went with the tanker.
Second, choose your powers and try to fit them around a theme. My guy is an inv/super str tanker. My theme is a man trapped inside a suit of power armor
Third, come up with a story for your character. You can always edit it later if you don't like it.
Lastly, I love to plan out my character's development. Because I have it planned out, I can inform others of what I am going to do, and it makes it easier for others to RP with me.
Hope that helps.
The Pscyborg
Protector sever