Hi SnowWhite
Welcome to the BSD family. It’s absolutely fine to tailor the diet to suit your likes and dislikes, as long as you are not eating sugars and starchy stuff. You said no fish, but I’m assuming you eat meat(?), if so you’re fine with that and veggies you do like, but do try to avoid root veg, as a lot to these are starchy – try to opt for those that grow above ground. A lot of people seem to be deviating from the menus in the book and devising tasty dishes for themselves, some of which they post here, so take a look at the recipes on the site, there might be something on there that you like the sound of.
I’m sure you will soon be seeing positive changes – keep us posted on your progress and good luck.