How to take full advantage of running a full bitcoin node?

So I am relatively a newbie in bitcoin and I started run a bitcoin node with Umbrel and a raspberry pi 4 about a year ago. The reason is to help contribution the decentralization of the bitcoin network.

I am curious how to make better use of the node. I do have a couple btc that I put on a ledger hard wallet that I am willing to use to run a lightening node. But after some search, it seems that most people lose money running lightening node. Some people say you can have better privacy with the node, how does that actually work? I mostly hodl and don't really do anything with my btc. How does having a node help me?

Thanks!