I don't think you need to worry too much, keep the phrase "food for fun until they're 1" in mind but maybe speak to your GP/HV about whether or not, nutritionally speaking, your LO needs more. I don't know anything about BLW and I'm not brave enough to try it, but there is loads of info on it in the weaning section on here and I know there would be lots of mums who would be willing to offer advice and support. With regards to the gagging thing, apparently that's ok and a natural reaction after only having liquids. As the weaning process goes on this becomes less frequent as the gagging reflex weakens and moves further back so you should persevere despite this (but if its very difficult or the gagging is very strong then perhaps seek some medical advice). So it's important to get them used to food alongside their milk.
Try a few different puréed foods, there are loads of recipes to try and remember that LO's taste buds are very sensitive so try some simple flavours first. I used the pouches, apple or pear which LO loves and some combinations like parsnip and apple can be quite tasty too. My LO is 8 months, I weaned early at 5 months but LO still can't stand anything with broccoli in it even when it's only a tiny bit. Don't be scared to go back to things LO didn't like at first, most foods are an acquired taste for LOs.
Good luck!
