Advice for 10 Gallon Tank

Hello,

I'm brand new to saltwater and have just begun seeing up my first tank. It's only 10 gallon, but I expect to get a larger tank and start doing some reef stuff in the near future.

I've got a Rena Filstar XP2 for filtration which is rated for 70 gallons so I'm way over what I need there.

I'm hoping to get away with a pair of the clown fish and maybe another small fish and /or some invertebrates.

Any advice on a which species to house together would be greatly appreciated, especially with the invertebrates.

Thanks

-Also, I'm picking up the live rock tomorrow afternoon to begin the cycle so I'll have some time to make some decisions. The only thing I'm a bit fuzzy on is where the initial ammonia should come from to get things going.