I can try and help.

There are two apps on umbrel. Thunderhub and ride the lightning

These two apps are tools you can use to set up lightning Chanel’s with other nodes.

There is a group on telegram. #Nodestrich. Here you can connect with many plebs that have lightning nodes and get help

nostr:npub1aeh2zw4elewy5682lxc6xnlqzjnxksq303gwu2npfaxd49vmde6qcq4nwx can help you get set up in there.

Wishing thunderhub you can also connect your node to Amboss and also join the nodestritch group there

I suggest doing the above as a first step then also look at nostr:npub1rxysxnjkhrmqd3ey73dp9n5y5yvyzcs64acc9g0k2epcpwwyya4spvhnp8 on YouTube he has some great tutorials

Once you have done all this you will be in a good place to start opening channels with other plebs