Im glad we have you over here @songdove.
Your typing style is very nice, not as most of the newbies here you know something about bitcoin and it's mechanisms.

I wanted to ask you, if you are not able to convert only 15$ ( if you cant, then less ) to bitcoin?
It would be really nice if you can afford it, because I would say that this is still really small sum to start with.

15$ is currently around 0,01254 bitcoin.
Firstly, I suggest you staying out of any type of investment sites, most of them are ponzi scheme's or just regular scams where you dont get anything for sending them your money.
If you want to earn money only on storing them somewhere, then investing in reputable cryptocurrency casinos might be a good idea, I think that cryptogames.com are fine enough.

Also, stay away from gambling, the chance to win something bigger isn't high enough to take the risk.
The best solution for you is browse through "service" section to see what kind of skills do people offer.
That would be the best way to make bitcoins, or also through signature campaining- but you need higher rank than newbie for that, jr.members are getting payed really low, but it is something at least.

Just please, dont touch faucets anymore, you can use your time in better way.