Why not start with rice cereals first, they are better tolerated than other grains. Try frisogold rice or cerelac rice with milk first, then you can start incorporating other foods. You can as well do home made rice cereal yourself, google it to get procedure

Try home made food, like draw soup

Children generally tolerate weaning differently. Therefore, if your child refuses one type of food you can try others till you get to what he/she likes. However, if your baby is currently vomiting after every feed, it may signify that he/she is ill. It would be best to see a doctor if the vomiting persists.