If you want to do it soon go with banggai cardinals (they are also easy) ,neon gobies(similar to clownfish but not as popular),yellowhead jawfish (not terribly hard),and/or orchid dottybacks(they are harder to raise though). Clownfish could take 3 years(1-2 is common) to spawn and are aggressive. If you want something easy buy a mated pair of neon gobies.
I would suggest you get the marine breeders guide to breeding fish it's a great book and will answer more of your questions,I have it and I absolutely love it. Good luck!