Do solids satisfy like cereal in 4.5 month old?

My baby is ebf. She is four and a half months. She spits up a ton--like about 2 oz after every feeding. She wakes every hour at night and im starting to think its cuz breastmilk is not satisfying her hunger any more, so I am contemplating starting her on solids. I know cereal would make her stomach feel full, but I kind of want to to sklp cereal and start on avocado since cereal is not very nutritious. Would the avocado, yams, carrots, etc satisfy her hunger the same way cereal would? Thanks!