The Garmin watch options are overwhelming, looking for advice

So I’m giving my wife my Fenix 6S since she’s getting into triathlons

I’m looking to replace it with something similar, but between Forerunner series and Fenix series I feel like I’m swimming in options

I would like multi sport options (I run, bike, cross country ski), sleep and HR tracking, and a vibrate alarm. What’s the most basic/inexpensive option that does all of those? I’m not opposed to buying used or refurbished.

The only line of watches I’ve ruled out is Vivoactive. I had one in the past and the GPS accuracy was horrible.