I weaned Izzy at 4 months as she needed it but as soon as she was able to hold food I gave her things to eat herself...she hardly ever gagged tbh and never ever enough to make me think she was choking
Izzy now (as any ladies on here will agree) eats soooo well, she eats a good amount but also will try anything! She has a great diversity for food as she has been offered lots of things to try and if she tasted it and didn't like it that was fine, but she would still give it a go next time!
You need to be VERY chilled with BLW, if you get wound up easily and worry too much about the amounts they are eating then you will probably struggle and the baby will feel this and react.
The best piece of advice I can forward to you is - don't sit and watch your baby eating!
Instead the best thing to do is have your lunch too and just chit chat about stuff but don't focus on the food, if you aren't eating yourself I would say tidy the kitchen or whatever becuase the minute you sit down you tend to end up staring at them, analysing how much, how fast etc...not good!