You can find information on what each of them do in our documentation, under the node’s name: Google Sheets | n8n Docs; Google Sheets trigger | n8n Docs
If these descriptions aren’t deailed enought you can also, for example, ask any AI tool that you like what each of these actions do and ask it to reply to you in french.
As a test I asked this and this is the replyI got: https://www.phind.com/search?cache=b15agwv9wua50y9w2i35j02s
I know you mentioned you’re not being able to learn much from youtubers’ tutorials, but n8n has recently launched a series of videos explaining to users how to use our tools: https://www.youtube.com/@n8n-io/videos
Ultimately the best method would probably be to creat a trial account - or run n8n locally - and follow the tutorials and start playing with the nodes that interest you.
The tutorials don’t talk about every action in every node, but they explain the base of how n8n’s logic works. From here users just need to apply the base logic to the different nodes they’re interested in to achieve the outcomes you’re looking for.
You can also create a community post describing what is it that you’re trying to build in particular.