Model: LENOVO 82WM Legion Pro 5 LENOVO_MT_82WM_BU_idea_FM_Legion Pro 5

Hello! I think there's a fan issue with my laptop, Yesterday, while not running any program, the laptop was just " on", it started making this very soft sound, it doesn't seem to get any worse when I'm running anything heavy. Almost like a cat purr, I've had the laptop for years and this is certainly a new sound. Here's a 10 second video of it, you have to turn your volume way up to hear it (not a prank I promise you) https://drive.proton.me/urls/36SJE4WA6M#mq36NBG8two5

Do I crack it open and take a look, or leave it to a pro? I'm ok with the software side, but not hardware.