colleen had the maxillectomy as i did - so it will differ. they did remove part of the palate with both of us, but probably a big difference from what you will have done.
colleen still sings - a good fitting obturator is the key and that can be tricky to get a good fit for a while ... as the tissue is constantly changing causing a need for refits ...
i too used to sing - probably still could but it would be different ... when i have the permanent obturator made in a few months i hope to have a good fit like colleen has, and this may make singing more as my old norm.
best wishes - i am sure colleen will be along soon