As Ladybird_gal said always check with your team when in doubt, if you feel they have been vague please call and ask for more information.
I can only offer you my own personal experience as to what I was told hope it helps.
First 2 weeks liquids only, then 2-4 weeks puree, 1-2 weeks soft food and start adding regular foods one by one leaving very dense/stodgy items to the last (white bread, very dry meat, red meat). By week 8 post-op I was eating a normal diet. My instructions said that I should be able to manage most foods by 3-4 months and I could.
As for foods to avoid:
Anything with high sugar (more than 5g per 100g) such as sweets, chocolates & pastry.
Anything with high fat (more than 5g per 100g) such as fried foods & crisps
Carbonated beverages (can leave them to go flat and then drink them).
I was not advised to avoid alcohol, only warned of the increased sensitivity that I could expect. However, it is common for docs to ask that you stay away from it for up to 12 months due to the high calories, increased sensitivity & dehydrating properties of alcohol.
HTH,
Nic