So said you have no clue where to start perhaps I can help! You must drink filtered water. Cut out all sodas and sugary drinks fruit juice even unless it's fresh. A good organic liquid vitamin along with minerals is really helpful but more importantly so are probiotics are probably the most important thing. Try to avoid coffee and if you do coffee do cold Brews. That is just a start perhaps we can keep in better contact and have longer conversations on Discord about health and diet. I'm not an expert but I do eat healthy and have helped a lot of people with just diet suggestions alone.
I recommend the company garden of life!