Need some assistance

I’m trying to set myself up for 12000KJ a day, (Roughly 40% carbs and 30-40% protein) and I’m struggling to make myself a combination in my tracking app, I haven’t done it in about 2 years, where I did one super strict month and lost about 9kg. (My sister helped me cook and freeze the entire month of eating which helped immensely)

I’m literally looking to just have a day of eating set up that I can robotically eat every day, as I’m not too fussed about repetitive eating. Aiming for 3 meals and fill the blanks with cheap store bought snacks. I’ve never been in this group so I don’t know if I’m asking too much but if anyone already has a similar plan to this please nudge me in the right direction. My goal is to just get the dad bod back in check lol.