Probably stating the obvious, but during the start of my career as a front end developer, I was so overwhelmed by the number of technologies that I had yet to explore, I grew anxious just thinking about it. The solution: take it easy - you don't need to know every single language or framework, as there are so many out there it would take more than a lifetime to learn all of them!
As a follow up from above - learn one thing at a time. You need to grant yourself the opportunity to process all of the information so it will stick so you can actually use it in practise. It's not a competition so pick one at a time and remember to have fun!
This was probably my biggest challenge. But to be honest, it's one of the biggest ways to improve yourself as a dev, or any career path for that matter. I think it's more valuable to share what you don't know rather than to keep quiet. Because what on earth could you be ashamed of anyway? In the end, honesty is valued way more than wasting time on something that could've been solved in just a minute, had you just asked. And remember, there are no such things as dumb questions. So write them all down, ask and learn!