Hi, welcome back to BW
Have you seen this information here:
Information on choking and gaggingThere was a terribly sad news report around the time I was BLW with my DS, about a LO who choked on more traditional puree style food whilst at day care. I think the thing is that they can choke on anything, even tiny bits and purees, I actually felt more confident handing my DS a big wedge of food than I did a small amount of something. I had a bit of a scare when I fed DS a big chunk of kiwi and after serving it to him on his tray I licked my finger where there was the tiniest slither of kiwi ever, about the size of a grain of rice, well, it caught in my throat and I was hacking and coughing, fighting for air for several minutes - not full on choking of course, I was getting a bit of air in but it didn't feel like enough air to give myself a good hard cough to get the bit away from my wind pipe. That experience really scared me but my DS happily chomped away at the big bit of kiwi and was totally fine.
Perhaps you can look for a paediatric first aid course near where you live? These are really useful anyway and you could learn what to do in the event of a choke which might help with your confidence.