It's a 'when' question.
In this single instance, a half-hearted decision won't do. You're either in or you're out.
The decision must be made at some point, some choose to do it early in their life and others later. Many have an experience which makes the decision for them and a poor, unfortunate few never realise the question, deteriorating over the years.
When will you make your health the priority?
The word priority comes from the word prior, which means to come before something else. You can only have one priority, the thing which is your irrefutable, point of first contact standard, and there is a point where health must become it.
There's no fighting the evidence that your health declines as you age.
Below shows a graph taken from research done by the World Health Organisation and shows the deterioration (orange line) vs the prioritisation of health (blue line).
There's a massive difference which only grows as you get older.
At what point do you throw down the gauntlet and make the decision?
Wait to find out you have Type 2 diabetes?
Realise you are out of breath giving a simple presentation?
Wait until your first stroke?
Realise you can't tie your shoes on your own any more?
There are two paths on the above graph. Both are options of the future.
(I'd even say with proper training and guided nutrition the blue line can continue to increase up into your 50s)
It all comes down to one decision.
You'll have to make it eventually and it's going to be a lot easier if you do it now.