My personal opinion if you just want a simple, easy to remember healthy eating plan is:
1. Avoid "diets" unless you have a medical reason for being on a special diet.
2. Stick with whole food staples - like beans, lentils, rice, eggs, peanut butter etc which are easy to cook. Use seasonings and condiments for "flair".
3. Don't compulsively avoid processed foods or ingredients, just try to not eat too much of them.
4. Add in a multivitamin or some suppliments like Omega-3.
5. Find some no BS guide to nutrition basics, and avoid all of the trendy, superfluous dietary information out there, like suppliments, superfoods, "paleo", "no-fat", etc which turns eating well into rocket science. People have managed to eat healthy for 1000s of years long before diets and marketing hype was ever invented.