$20k to invest in various Vanguard ETFs. Advice on allocation. Hi everyone.

I am going to put $20,000 in a variety of Vanguard ETFs and NEED advice in regards to what % allocation I should be doing. 

The following are the ETFs I have selected.
* VGS ?%
* VGE ?%
* VAS ?%
* VAP ?%
* VGB ?%

I have $600 free brokerage with CommSec.

Below is my current position:
* 28 M Engineer earning $100,000pa
* married, no mortgage (renting in Sydney)
* good saver, though not fugal
* no debt

This will be my first time investing so any other tips/advice would be greatly appreciated.

Thanks in advance.

