How to invest in ETFs when I have a big sum of cash?

Hi, I made a post the other day regarding my inheritance and my plan to put it all into EPF. It is just over 1 million ringgit and some of you told me it's better to put a large % of it into ETFs instead.

I wasn't really familiar with ETFs so I read through this sub abit and found VWRA was a good one and I have somewhat of an understanding of what it is. However, I see alot of you DCA into it which I think means putting abit abit each month since it's safer incase you invested during a bad time.

Should I still do this? I'm thinking yes, but what's a good amount and time interval? I've downloaded Fsmone (still waiting for my account to be approved, it's been a week :() and is it safe to put in this much money?

I don't plan to use this money at all and I can sustain myself with my job so ideally I'd want to put 80+% of the million.

Thanks in advance