Hi L.,
You've got great advice so far, but I'd just like to add two things. Apparently, the more different tastes you introduce your baby to before they turn one, the more likely they are to continue to appreciate these foods once they become toddlers, those famous "picky eaters". As others have pointed out, solid food is not really important for nutrition in most breast-feeding infants before they turn one (and sometimes later), but it's all about getting the body - and the mind - used to the taste, texture, and how to digest this new form of nutrition, before it starts to become essential. At only just over six months, your little one has tons of time to learn these lessons!
Also, I was worried when my son was about 8 months that I wasn't giving him enough lumpy food - he loved all different kinds of mush, but always spat up even the tiniest lumps. Well, I gave up on the lumps for another four months, and he's now 18 months and chowing down on everything I give him, not a puree in sight. I was (am) a nervous first-time mom too, but it seems you can trust your infant to let you know his own needs!