Good luck getting everything set with your job. I'm a teacher, and had a similar situation--making plans and preparing things for a substitute. It's a pretty intense and time-consuming project.
I still think you'll be able to chew things to a liquid, but you'll have to take small bites. You won't be able to put the same amount into your mouth that you do now.
As far as weight loss. You will lose weight, there's no doubt about
that. Your stomach will not take much more than a quarter of a cup of food at a time, so there's nothing to do but lose weight.
The only caveat is that once you're feeling all better (4 months post op or so) and your eating gets back to normal, you can easily begin to gain weight back, so be sure to be aware of that if you're hoping to lose more and maintain your weight loss.
Only you know your chewing capacity, but I'd bet that if you take small bites you'll be just fine. If not, as you said, a food processor can help.
Why don't you try your chewing out right now? That's what I did. I tested things to see what I could chew to a liquid. You can take little bites and chew, chew, chew. See what happens! There's nothing to say you can't check your chewing abilities out now, and develop a strategy that works for you. One less worry.
Take care and have a great week!