Mine was a very petite boy but took to solids in a big way too.
It's generally recommended to move towards 3 meals at around 8 months but if he is particularly interested it's ok to offer 2 or 3 times per day now. He clearly takes plenty of milk, just watch that it doesn't drop right off with the introduction of more solids, yk, milk is still his primary food.
If he's 6 months and sitting well you might want to introduce some finger foods too.