Hey Nir,
welcome to the forum!
First of all seeing your adset I can say one thing...
...people don't want to train to loose weight, the don't want to eat healthy, and you set up an image with a girl plank'ing and smiling while doing so...
Who the f**k enjoys planking? (I like it, however I don't usually smile while I do it. We're looking for the masses here, and since most of the people are not fit and healthy, they DON'T! At least initially)
Let people see the benefits of loosing weight, not the training, the diets or some wudu magic pill.
Benefits like: being more attractive, confident, happy...
The same applies to your copy.
What's wrong about it? It's clichè.
You see, people have heard it all in health niche and the worst thing you could do here is using clichès in your copy.
I guess the majority of the prospects are women...
...they want to loose weight, perhaps they already buyed some products that didn't work for them.
Secretly, or even unconsciously they are hoping to find a new product—a new headline—that promises them a new way to satisfy that age-old desire.
About the email sequence, you can send them an subscribe link to their email, so when they do all your emails will not go trough the spam folder.
While emailing, you need to connect with the prospects, copy here is VITAL, it will make or break you.
Also you'll need to show often, don't email once a week, try emailing once a day for 7-14 days and with a good sequence you'll crush it!