Hello
I'm also new but have some thoughts
My HV recommended baby-led weaning, I did some research, didn't find enough to understand it so bought a book on Amazon which I then read cover to cover.
Basically you don't feed the baby any puree, you go straight to food. To begin with they won't swallow much, that is normal. They will touch it, chew it and most will then come back out. As time goes on they will start to swallow more and more.
Meanwhile you still feed the milk feeds as per normal. At this stage a baby doesn't see food as something that fills them up so when they are hungry and cry it is milk they are asking for. You should only ever feed them food when they are not due a milk feed as you just upset and frustrate them when you give them what in effect is still a toy at what they think is dinner time.
As to the foods you can feed they are many and varied. Low salt, non-processed and some things you should avoid, like nuts and honey.
I have started my son from day one the baby-led way and it is SO easy. He tries everything I offer him and is swallowing and digesting a wide range of foods now. He is eight and a half months so is two and a half months experienced. He still has his milk which is good to feed anyway as it is full of nutrients, but he doesn't have as much or as often.
As for the weight change, I have found with my son that as he has become more active he has dropped on the line a small amount. I figured that was because he was burning more calories.
I hope this helps, I know some of it is not in answer to your question, although hopefully some is ... I would really recommend the baby-led weaning book though. It explains a baby's dietary needs and why some things work and why they don't. It makes so much sense and will make you see feeding so differently
Good luck!
Julie