I'm a sissy boy and I want to get a tramp stamp, plus belly ring, does that sound like too much?

I have no idea what a "tramp stamp" is, so I cannot comment on that. It is very rare to see a boy with a belly ring, but if you would like one, get one. You can always keep it hidden under your shirt. How much is too much depends on the individual. How far do you want to go in presenting yourself as a sissy in public?