The good thing is that you started to think about your health! 👍
Since you live in an environment that is full of marketing and is a part of your life, then it's normal to get involved in a marketing based diet. If you eat only junk food then Keto Diet is the way to go.
When your health gets improved and you start to like the first results, I would suggest to read some books about health. Start to question yourself on what exactly do you want and why you want that.
Like, for example, you want to be healthy and live longer than others? Then it is not about some nice sounding diet plan but a change of your lifestyle. And in this case maybe it is worth to look at those who actually live 100 years and even 114 or maybe even longer, to see what do they do, how they live and what they eat.
Just in case you survive Keto Diet and want some real lifelong changes that last. A quote from goodreads.com website from a book The Longevity Plan.
Eat good food
Master your mindset
Build your place in a positive environment
Be in motion
Find your rhythm
Make the most of your environment
Proceed with purpose
It is American doctor that was looking for some answers about health and writing about his findings. Now he makes money on his findings. Just in case you prefer marketing based health improvement systems. 😂