I started off with purees my daughter was do exactly the same. Projectile vomiting and gagging. She didn't like being spoon feeding either. So we have started finger foods, surprising she is absolutely loving being able to feed herself. She hasn't thrown up and only gagged a couple of times. Definitely worth a try
Although not very nice weaning and gagging/ being sick often come hand in hand until baby learns to move food around their mouth properly. There’s a Facebook group called weaning the BLW way which has lots of info on gagging and being sick etc and you may be able to find some stories for reassurance. If it was something particular I’d say maybe an allergy or sensitivity but if it’s everything I’d say her gag reflex may be quite far forward. Hopefully with plenty of practice things get easier. Have you tried mimicking what she needs to do like chewing and swallowing? This helped my baby loads x