Care to elaborate? I havent done any frontend stuff in a few months but it appears to be the only solution there. Even when using typescript, you still want and need to know js.

Regarding Java, i think its a good starting point if you want to hack your first web project together. You sort of see how everything works together. Before that I always recommend looking at C just to know what you are missing out on. If there is some calculation happening you can always call some C/C++ code to see if you get some speed ups by optimizing for the cache (just an interesting experiment if youve never done it before.