Losing weight and finally get fit & healthy after a lifetime of inactivity and obesity is HARD. Right off the bat...one should prepare themselves for a rollercoaster of emotions, frustrations, success, and road blocks. If you're anything like me, you will sometimes struggle to make the healthy choice. You will struggle with keeping your portions to a healthy amount. You will feel like it is impossible that you will ever have the stamina to exercise the way you should. You will try - and it will go terribly and you will feel like a total failure.
But you're NOT a failure! All of those struggles and roadblocks can serve as some of the best motivators and learning experiences, and ultimately lead to greater success. If you just committ yourself and just keep at it, even after "failures"...you will find that you are stronger than you ever realized. And your improved health/weight/fitness level will reflect that.
Just make sure that you never set yourself up for failure by hoping that it will be easy. Because more than likely, it won't. Expect, and be willing, to work hard. To make sacrifices. To prioritize. To struggle.
Expect that it might take a long time - and be okay with that, because you know that is the healthiest and most sustainable way to do it!
And just remember - In order to change yourself, you need to challenge yourself.