What are the steps to skin care??

I've been getting so confused about what comes first and last. I see a variety of steps, all different from one another. I attached some examples of what I see. I'm not so sure if it's really necessary to use every product. I know some skincare influencers use like maybe 3 or 4 products to achieve their ideal skin care goal and some use extra products just for their skin too, to treat their skin.

Does it depend on the type of skin one has? Is it really necessary to use a bunch of products to achieve a certain skin care goal? I hope I make sense of this. I just don't want to keep buying products that won't contribute necessarily to my skincare goal or make me feel icky from how heavy some product feels when used.

I'm not so sure if there are certain steps we must follow even if we use 3-4 products for skin care. The whole step by step guide for skin care is confusing. :((