So you're living based on how you will be remembered by strangers? That sounds incredibly unfulfilling and doesn't sound like a good way to live. In a few hundred more years almost no one will remember the names of those people either.
>da Vinci, Tesla, Turing
It's incredibly safe to say that you are not going to be as successful as these people. Almost no one achieves this much success in the sciences. At most you will probably advance your field by a few useful steps and then be personally forgotten about except in research paper footnotes.
>not because they had a successful family
You know who cares about you and remembers you more significantly than as a research footnote? Your family.
>I just want to keep the dream I had as a kid
Man, don't we all.