Belly button piercing?

I want a bellybutton piercing but:

1. I'm about 30lbs overweight

2. I don't know if I could wear 1 piece bathing suits without it hurting.

3.I don't know what people will think.

4. I do martial arts so I don't know if I would have to do anything special when I do karate or spar.

can anybody give me any advice on them?

Are there any tips from personal experience I should know?
Updates
+1 y
also, what age did you get yours done and did you regret it?
Belly button piercing?
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