Going too change my belly ring for the first time...?

i've had it about two months, my piercer says since there is no puss, i can change it. i got a really light belly ring, it's not dangly or anything.. but, the bar is black and it's like.. bendy? made of plasic or something. is it okay for me too use that? i read somewhere online that it's like bioplast or something? i don't know.. i also have a silver one that came in the packet. which would be better?