What kind of belly button piercing should i start with

Im getting my belly button pierced my older sister got hers done and says it only hurts alittle and i was wondering what kind of barbell should i get for when i get it pierce what kind would be good and what would be good cleaning supples to clean it with?and would it be ok to but one of those pierced belly chains in after a month or so?

placeholder text for bug in Chrome