Can't find navigator in toolbar using windows in Lightroom

Apparently you are watching the wrong videos. There is no navigation tool in the cloud-based version of Lightroom. You can blame Adobe for confusing everyone with their decision to name the two versions so similarly. The current versions of Lightroom: Lightroom Classic is the "old" (not really) familiar version that stores images locally on your hard drive and has been available for more than a decade. Lightroom is now the cloud-based Lightroom. The problem is that there are myriads of old tutorials available on YouTube and elsewhere that are for older versions, and it's up to you to filter through all of them and find which tutorials applied to which versions. Good luck.

Moved as requested by MVP John Ellis...

Thanks for the patience as I worked out how to move on the new forums 😉

You have the cloud-focused version of Lightroom (2.4), but you posted in the forum for the desktop-focused Lightroom Classic. If you repost in the Lightroom forum, you'll get a quality answer faster:

https://community.adobe.com/t5/Lightroom/bd-p/lightroom 

Or you could wait for a moderator to move this thread. But that might be a while, given the confusion of the new forum platform.

Lightroom version: 2.4 [ 20190802-0905-45e6444 ] (Aug 2 2019)
NGL Version: 1.10.0.4
Operating system: Windows 10
OS Version: 10.0 [18362]
Application architecture: x64
System architecture: x64
Computer model: Dell Inc. Inspiron 13-7368 / Intel(R) Core(TM) i5-6200U CPU @ 2.30GHz
Logical processor count: 4
Processor speed: 2.4 GHz
Built-in memory: 8051.4 MB
Real memory available to Lightroom: 8051.4 MB
Real memory used by Lightroom: 585.8 MB (7.2%)
Virtual memory used by Lightroom: 540.4 MB
Memory cache size: 907.6 MB
Internal Camera Raw version: 11.4 [ 274 ]
Maximum thread count used by Camera Raw: 3
Camera Raw SIMD optimization: SSE2,AVX,AVX2
Camera Raw virtual memory: 0MB / 4025MB (0%)
Camera Raw real memory: 0MB / 8051MB (0%)
System DPI setting: 144 DPI (high DPI mode)
Desktop composition enabled: Yes
Displays: 1) 1920x1080
Input types: Multitouch: Yes, Integrated touch: Yes, Integrated pen: No, External touch: No, External pen: No, Keyboard: Yes

Graphics Processor Info: DirectX: Intel(R) HD Graphics 520 (23.20.16.4973)

Application folder: C:\Program Files\Adobe\Adobe Lightroom CC
Settings Folder: C:\Users\Kelly\AppData\Roaming\Adobe\Lightroom CC

Please do the menu command Help > System Info and copy the first ten lines here, so we know the exact version you're running.