Question about rolling over 401k:

I rolled over my 401k from my previous employer to Vanguard, where I had a Roth IRA account and where my new employer 401k is. The total amount is sitting in a brokerage, so I need to invest it somewhere, right? I feel like this is a dumb question.

Also, if I invest it, is a target date fund the best option? I’m 38 but probably 25-30 years from retirement. So I’m looking at a Target 2050 date fund.