Just to clarify one thing: Getting in shape is not always equal to loosing weight, but often the opposite.
For the specific case of Zeltrax, it definitly is. 110kg for a 168cm really is a lot. I mean, what does a 180cm tall bodybuilder weigth with his abstruse amount of muscles and doping? Like 120kg afaik. And that's a totally impossible ideal for the "average" person who just wants to get in shape.
For 168 cm 70kg can be quite fine imo even with a good muscle mass, so in this case there's definitly a lot of weigth to lose.
I'm quite sceptical about nutrition plans. I think common sense, a little maths and basic knowledge about food is absolutely sufficient. But as an example it's probably good to have one.
I still think that it's easiest to build up a mix of training and good nutrition step by step.
Stamina-> Stamina & Muscles -> Stamina & Muscles & Nutrition
Stamina first, because it's good to have some before starting on the muscles - but there doesn't have to be much delay until the next step. Muscle training next, but without changing nutrition so much right away - it's hard enough to stick to one of these things for starters.
Nutrition last, because at that point a better physical shape of stamina and muscles will make burning fat much easier. And when one is used to the physical strain already, it makes it easier to cope with the change of foods.
For myself I found that a certain balance of food is kinda important. I couldn't control it properly anymore when I ate too few for breakfast, I'ld always search for more food then and ultimately gain more calories then I'ld have gotten with a more normal breakfast.
However, I also started thinking that the type of food really is overrated and only the amount bothers. An example:
When I only ate a yoghurt for breakfast (150kcal) and dropped food during break exept for one of these watery cocoas from a vending machine (like 200kcal), I'ld always get hungry during work. Since we could eat the chocolate we produced (yayy, great job

) I obviously couldn't keep my hands from it. But even if chocolate has a lot of kcal, very little already helps a lot when eaten in the right moment (really improves the momentarily shape when one is low on blood sugar). 10g of most types are around 40-50kcal only, but can be totally sufficient and a great boost from 12:30 until work ends at 14:00.
That makes ~400kcal for the morning including work, so a lunch of 800kcal still leaves a lot of daily requirements open (around 50%).
Now obviously this isn't anywhere near healthy for long term, but reduces the time for cutting weigth considerably. When body is in a good shape beforehand, it's simply the fastest way. That's why I said that training comes first and nutrition comes in a second stage.