Products on Home Page or create "Buy in" first??

Hi
I'm a speech therapist, clearly not a web designer or marketer. I made this site, www.speech-therapyathome.com to try to sell home speech programs to parents. My biggest question at the moment is what I should have on my home page. Right now I try to establish some credibility and to create "buy in" - tell parents why they need my products. To buy the products they need to go to another page. Is this a good idea? Should my products be on my home page?
Any other comments on my site would be much appreciated
Thanks for your help.