If you want a separate window and fast plots, you can try Makie.jl.
See also the Animation and Interaction sections in the documentation.
If you just want zoom-able plots, you can also consider some of the backends of Plots, like
Plotly, VegaLite or Gadfly. But if your content is less static and if you want to show animations, Makie is probably better.
Since you are new to Julia, be aware that Julia is in general very fast, but the startup is slow. There is the famous time to first plot topic, which means that from opening Julia to seeing the first plot it can take almost 30 seconds. But after the initial plot, the rest is fast 
And Julia is very well suited for all kind of mathematics!