Tasha, congrats on two beautiful children.
The WHO does recommend not starting solids until 6 months as mentioned many times and this is because the baby's digestive system is not ready for them. WHO also recommends bf for 2 years and the average age of baby weaning off the boob is 4 years old. Don't be confusing a baby's curiosity with their needing to be starting solids. If you try baby lead weaning (this is onto solids, not off bf) then bub will tell you if he is ready, but not yet, he is too young.
*Always believe you can breastfeed
*Never blame the milk
Good luck