Weaning is a significant shift in your routines and is a stressful time as we all want it to go well and not end up with a fussy eater. So it's not surprising you are feeling worried about it all.
I would have a read of the NHS advice on weaning which sets out what you should be aiming for by when.
At 8 months there's no need for snacks between meals, and you should be moving towards 3 meals a day around now. Biscuits are absolutely unnecessary and nutritionally dubious. Don't feel pressurised into giving them, not because of the fear or choking, but because they shouldn't be part of a baby's diet.
Bread is ok, but a bit high in salt, so I would give it occasionally.
Babies don't need teeth to chew - they have really hard gums (as all the teeth are underneath waiting to come out). Their hard gums are more than capable of chewing suitable finger food.
Ideally, you should be giving finger food with each meal, to allow your baby to feel and explore the food. He needs to learn to feed himself, and the earlier you start the easier it is.
Babies often gag on food - this is not the same thing as choking. Choking is not common, and is silent and scary. Gagging is noisy and normal, it protects the baby from choking as the food is brought forward in the mouth. This is how they learn to chew and swallow.
If you give easy finger food like well steamed veg or ripe fruit then choking is no more likely than when giving lumpy purees.
I hope I've answered all your questions! Don't worry about what other mums are doing - they aren't in your shoes. Nod and smile if anyone offers any "advice", and say something non committal like "oh ok". And then ignore it!