Hi K. -
My son also began solids around that time. I started with rice cereal and oatmeal and stuck with just those til he was about five months old at which time I started introducing other foods such as avocado, sweet potato, banana, etc. You should only introduce a new food every 3-4 days to look out for allergic reactions. I also only did 2 meals a day (breakfast and dinner) up until about 8 months. There is a great book titled "Super Baby Foods" that I found very helpful in determining what foods my son could start at various ages. Hope this helps.
-R.