URL call + Which layer to choose

Greetings,
I am a newbie and I got lost in the documentation and the multiples choices.

I would like to create a URL call in order to have as image of a satellite view without cloud, in order to create art maps.

1. I went into Configuation utility, There are so many choices… which services should I use to have high quality no cloud satellite image ?

2. I build my URL call:
   https://services.sentinel-hub.com/ogc/wms/MYTOKEN?request=getmap&bbox=-65.977921,48.952084,-65.901260,49.048642&LAYERS=TRUE-COLOR-S2L2A&SRS=EPSG:4326&CRS=EPSG:4326&width=4000&height=5000

For layers, I copy / pasted what I was seeing in ID layer in Configuration utility.

I keep having this error message :

I am wondering what is wrong with my request.

Thank you for your help.