> Now, just wait, ideally 10+ years, before looking into your account again
That might not be the best idea because of escheat. Here's a story about someone who didn't check on their stocks for years and the state claimed them. https://www.npr.org/transcripts/799345159
It is also wise to look at your accounts at least once a year because some of your investments might pay dividends that you have to report on your tax returns.
ETFs do pay out dividends from the underlying stocks. This does not require you to look at the account (in the US you will get a form at the end of the year summarizing what you have to pay taxes on).
