At just shy of 7 months, we're still new to solids (we started a bit early), but I thought I'd offer how I started (and where we are now).
We started at a tbsp (or so) of rice cereal per day (or whenever I remembered - sometimes only a few times per week), followed by the cereal mixed with whatever foods from those little jars (she didn't seem to like the puree's on their own... too sweet, I think) and some breastmilk or formula mixed in for consistancy. She still won't eat much more than 1-2 tbsp at a time.
That turned into a routine of breastfeed when she wakes up, followed by cereal a couple hours later before her nap. Then (sometimes), more cereal around dinner time (following breast or bottle before bed).
That lasted only a couple weeks before I decided to do BLW, so now she gets the cereal in the morning (sometimes), and whatever she can "gnaw" on at dinner with us (ie. whole steamed carrot, chunk or potato, broccoli, banana, etc). During the day I share a few small bites of anything I'm eating.
She has always opened wide and grabbed my hand to shove the food into her mouth when hungry, and pushed it away when done. She's a small eater, so I pretty much let her eat when she wants, and how much she wants.
That said, I do think there is a limit as to how much solids they should eat at such a young age. Always feed your breastmilk or formula FIRST, and as a main source of nutrition before offering any solids.