Which tools from igraph package I should use to analyse this network's properties?

Hi, Which network measures or tools do I have to use for analyse the following directed graph. It shows the flows of commodities between economic branches. I am asking beacause my knowledge on this topic is very poor because I am a self-taught, and in many books directed graph algorithms are omitted.
Thanks in advance

I went here https://igraph.org/r/doc/ and activated the search function in my browser. “diameter” could be a starting point or “ecount” but it depends on what kind of analysis you want to perform. I’m assuming here that most igraph functions for general analysis support directedness.

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Many thanks Alexander. It is a starting point. Maybe I could detect if exist some cluster. Which is the best function to enumerate all the walks?