I definitely have that too and I think to some extent, it's healthy to be curious. I think what drives me is the question of "How did you do that?" I enjoy asking this and listening to someone explain the process that lead to something great, but boi, even more than that, I enjoy getting asked that.
how do you deal with this syndrome of wanting to try everything?
This is also the key IMO. In order to focus on a project/skill I shut off social media (or any other 'feed' type thing that isn't specifically handy for the task at hand). This way I don't get distracted by anything that triggers the novelty - couriosity loop in my brain. I also think about projects in a way that assumes I'm the only one that ever sees this. That way I don't get distracted by the potential reward of social recognition/admiration.
What are some goals of yours? What do you want to achieve? Do you want to be known for creating something other people use?
My goals right now are to dive deeper into React, Flask and GraphQL, but I reeeeaally would like to learn Haskell and/or Go, although this is not realistically in the cards right now.
Is money even important for you? Do you have enough so you can focus on your goals? Do your goals require money or time?
Money isn't important to me. I'm kind of blessed/lucky that way and I can afford to work pro bono if I think a project can be a force for the good in the world.
Are you a self-taught person? Did you go to college?
I am self-taught and got my first professional dev-position six months ago.
What advice would you give your younger self?
Curiousity is not as bad as paralasys by analysis. Just frickin' do it. To focus, turn your smartphone off and block social media, it's making you distracted and subsequently limits your cognitive abilities.