Hiya Karen!
Recently I’ve been trying to get my family to do something similar with me, but it’s really hard if you decide to just drop the things you’re used to eating all together. I would start by maybe incorporating some of the new recipes in with the old for a few weeks and gradually cut out things you shouldn’t have, or replace them with a healthier alternative. I’m definitely a meat and potatoes kind of girl too, so slow changes, I find, are what work best. Since I started eating a bit better, I have more energy and I find the chemo brain effects me a little less then when I was eating all the crap food. I also try to take like a One-A-Day vitamin every day too, those help.
Really I commend you and your husband for committing to something like this willingly! It’s like pulling teeth over here, lol. Good luck to you both!