When you start feeding your baby with solids, you must take into account that eating solids takes practice. Although adults and children eat solids as something natural, for babies is a different and new experience.
Everything is new: the spoon, the position to be fed… The baby has only had a liquid diet, so the spoon is a different thing that comes to his or her mouth and he or she must get used.
Don’t expect that your baby eats a certain amount the first times. Focus yourself on letting your baby used to the experience and try that you both enjoy it.