I would be carefully with all such substances.
Make a good research before you order such a thing and look for side effects (most of them don't have any effect anyway).
Neither you, nor your body does really need any of them.
Also I'm a vegetarian and creatine is mostly in meat and fish as another reason I supplement it.
But I didn't find it in that shop anyway.
There are 100's of clinical studies on Nootropics of which many are approved by the FDA or by other governments for treating various conditions including age related mental decline. There are also dozens of studies on Nootropics in healthy young and older adults.
Insofar as needing them while some are endogenous (in which if your body did not make any you could not live) many are taken to address the biochemical factors of aging and to enhance cognition. If you are not concerned about the negative effects of age related cognitive decline or enhancing brain function nootropics are not for you.
Creatine while a helpful supplement no doubt is generally not considered a nootropic. I'm glad you find it helpful (which makes sense) being deficient in it. You may also want to look into Carnosine and L-Carnitine as vegetarians can also be low in those compounds and their supplementation has various benefits.