Want to run a secondary node on a new machine and want to use the blockchain data of existing node

[Bitcoin]

Want to run a secondary node on a new machine and want to use the blockchain data of existing node

I run a lightning node (umbrel, raspberry pi). I wanted to build a secondary node(c-lightning) on my laptop (ubuntu), from scratch. I followed some steps from their github but I'm now confused the the step that says starting lightningd:

Once I install bitcoin - will it start downloading the blockchain data immediately? And how do I configure it such that it accesses the bitcoin chaindata from my existing umbrel node?

Thanks in advance, consider me a n00b who's willing to read up and learn.

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