There is a great analogy I have read multiple times regarding momentum.
It is said that when a rocket takes off from earth it uses 80% of its fuel on the take off.
Once in space it coasts and does not have to use as much fuel due to the momentum gathered on its journey.
Whether this is exactly true or not is not the point. The point is that it can take a lot of effort and shifting to get something going. Think of pushing a car. It can be difficult to start but once two or three of you get your weight behind it, it starts to roll.
Getting fit and losing weight or undertaking a transformation is the exact same.
It takes a lot of momentum to get it rolling but very little to maintain. It takes mental effort to decide that you are going to change and make a concerted effort to change your lifestyle.
At the beginning, it's going to take a lot of support and tweaking of your approach but once you are rolling, I am confident you will have all the tools to keep at it.
So, it isn't easy, but it gets much easier.
Think about the first week in your job.
I am willing to bet that you felt swamped especially if you were learning all the processes and systems and how things work.
But after a few weeks you had it down pat and felt much more at ease.
When you try to eat healthy and lose weight you will have to search out healthier options, change your schedule, book in fitness sessions to your diary.
After a while it will be automatic.