Healthy eating is not rocket science. It is a continuous process which takes time, especially if you have never taken your health seriously. While we may be able to give you some tips

The first basic of starting healthy eating is by making and sticking to a schedule. 

Making a food diary helps majorly as you're jotting down everything that goes in your tummy.

Healthy eating goes hand in hand with a fitness plan

Eat all your meals. Do not skip them