Do you live in Scotland by any chance? If so the Maggie Centres are very good I understand.
I think it depends on what support your father actually needs. It sounds as though he just needs time to recover from the op and then to get through chemo. I went through this last year, for breast cancer. The chemo nurses will be very helpful - if he has nasty side effects he must tell the staff promptly and they'll be able to adjust dosages to help. Chemo isn't pleasant - its a long slog and at times very tiring, but its doable, and if your father is otherwise fit and strong, he';ll be able to manage as long as someone can take him to each chemo, bring him back, and be with him for the few days afterwards when he'll be feeling rough.
Chemo also varies a lot - some drug regimes are more aggressive than others, so knock you out a bit more. A lot of people have a mix of medication - but everyone is really closely monitored.
I think he(and you) will need to take one step at a time - he should recover from the op within about 3 weeks and you might then find he's ready and up for the chemo.
The McM nurses will probably be able to provide lots of leaflets and booklets and you might find tht once he's got to to know the chemo centre, the help will be more available. But this does not mean help at home unless he's really seriously ill. Personally I did find it helpful to be able to read up on the cancer and the various, complicated treatments.
Chemo can have serious side effects and if that happens he'll probably be admitted (eg if his immunity sank very low). He'll be given very detailed advice on what to check daily (temperature) and he'll be given a hot ine to ring if he is worried. I did use this and found the staff v. helpful.
I know its scary but try to not to worry too much and to take this one step at a time. I found it helpful to deal with what I definitely knew, rather than assuming the worst.
Does he have a circle of friends? I found people really rallied round, which was also very much appreciated eg offers of lifts, the occasional meal being made for me.
Good luck.