Yes, some of those 'liquid meals' are just so sickly sweet and difficult to 'stomach'. Yes, it will take very little of anything to make you feel full.
You are very much in the early days just now - and they have to make sure that everything 'goes thru to the other end OK' before allowing you to have more solid food, even custard or yoghurt - which will make you feel even MORE full.
I have a photo of hubby having his first taste of 'real food' whilst still in hospital! The look on his face is hilarious.
Yes, Make haste slowly. Hubby lost 3/4 of his stomach. 6 months later, he was eating whatever he wanted!
Take care xxxx