Hello, how can I find the timeline?

Hi @Luluanll 

I'm not sure if I totally understand your question, the timeline is visible in your first image. But, if you want to expose the parameters under the layer in your timeline, you need to use the little arrow on the left side to "twirl open" all of the parameters that are available to that type of layer. 

If you're trying to open the Expressions Editor, you need to click on the parameter of your choice while holding down the keyboard modifier, Alt or Opt.

I know you said you don't want to time remap, but just in case... in the last image you shared, the YouTube tutorial maker has enabled "Time Remapping" by right-clicking on the layer, choosing "Time" and then "Enable Time Remapping" 

Then they held down Alt / Opt while clicking on the Stopwatch icon on the left of the Time Remap parameter to make the Expressions Editor visible. Again, this is possible on other parameters as well. 

Hope this helps but please let me know if I didn't answer your question properly. 

Cheers,