I'll tell you what these lovely, helpful, insightful chicks told me:
You just DECIDE to do it. You make the commitment. You stop making excuses and you DO IT. If you think you can't, you are right, but if you think you CAN you are right too! So if you are doing WW at home and you have the materials, determine what it is you need to do and then go for it.
The program is only going to work if YOU work the program. What are the things holding you back? Figure out what those things are and then tackle them one by one. If you don't do well when you just have to make up what you eat as you go, then make a PLAN and plan for the whole day/week. If you don't do well with junk in the house, get rid of it. If you don't do well making estimates of servings sizes, get a food scale and weigh and measure everything. If you have trouble getting your fruit or veggies in, decide what you like, or ask others what they eat and how they eat them and get tips from others.
Support, help, tips - those things are all here at your fingertips, but only YOU can make that choice, to CHOOSE for yourself, your mental and physical health, we can't do that for you.
You CAN do it, start by taking "Can't" out of the equation