Is it a bad idea to invest ~80% of my earnings in long term index funds at 22?

I am 22, studying at university and fortunate enough to be living with my parents where I have no major expenses except my student loan which I will have to pay after I graduate.

I am able to put most of my earnings into the vanguard developed (VHVG) & emerging world (VFEG) etf 90/10 split and I plan on doing this as long as I can.

I also have small amount in crypto which I was also planning on DCA (around 10% of my portfolio)

Also is it best to invest in stocks monthly or weekly? Or does it not matter in the long run?

Thanks for reading.

Edit: I should mention I live in the UK