I just turned 18 and opened up a robinhood account and want to start investing. I definitely want to do VTI and VXUS with a 80/20 split. Both ETFs are at all time highs and it seems scary putting all the money in at once at the highs. I know that time in the market beats timing the market and today’s high is next years low, but I just want to be as smart as possible with how I start. I do really want to do lump sum and put it all in right now, but I also know it may be wise to DCA in case the market takes a bit of a cool off. What should I do?