Want to try vitamins, but don't no where to start?

I have been taking my own combination of batteries trying to give support in all the places I need it. I am still on my journey on feeling the different effects from different types. Here is a guide on how to start being supple-mentally educated from Harvard T H Chan's School of Public Health. https://www.hsph.harvard.edu/nutritionsource/what-should-you-eat/vitamins/