I want to make money with my current BTC how would i go about this
I it sad but you cannot buy any Bitcoin with just $100 at the moment, the Bitcoin is now pretty expensive and that is also a reason why some people do not invest in it even if they want to.
With a $100 you can try to gamble a bit and see what happens.
You can buy bitcoin even with $100 its not mandatory that you need to buy full btc, you can even buy a smaller amount but $100 won't give you best returns even if you invest it anywhere.