Welcome & congrats on your surgeries. First, as long as you keep your purées thin (use stock, gravy, milk, Mayo, etc. to thin out what you’re blending) you should be ok. The purée should still not be lumpy or contain anything coarse. Think baby food. You can blend a lot of things including tinned fish, poached chicken breast or thigh, boiled eggs, etc.
I love soup. You can throw anything in a pot to make a good basic soup. I usually start with the holy trinity (diced onion, celery & carrot) & then add whatever meat &/or, vegetables, legumes, etc. I have. Whilst on purées you’ll have to let the soup simmer for ages to ensure everything is really well cooked & breaking down then blend the life out of it. On the soft food stage you don’t have to worry too much about about blending the soup if it’s been well cooked. Plus it always freezes.
Second, don’t be surprised if food you expected you’d enjoy you don’t or your tummy doesn’t like it. Your taste buds & sometimes sense of smell can go haywire for a little while & your tummy can be very fussy. It’s always fine to go back a stage if you find your tummy is not ready for the denser food. We all heal at our own pace.
I ate a lot of runny scrambled eggs though it would take 3 days to eat two scrambled eggs. Some people struggle with eggs so be warned just in case. Yoghurt & yoghurt drinks are always a good option during the purée stage.
My surgeon recommended 1/4 to 1/3 of a cup though I could always sip on more soup over a longer period of time. But check with your medical team - I’m presuming you can still contact them for advice. You still won’t feel full or your restriction until you get onto solid food.
All the best.