Here are some resources that should be informative
https://bitcoiner.guide/wallet/
https://youtu.be/oX0Yrv-6jVs (old video, but fundamentally relevant)
For a node my current recommendation is nostr:npub126ntw5mnermmj0znhjhgdk8lh2af72sm8qfzq48umdlnhaj9kuns3le9ll as it is fully open source
nostr:npub1rxysxnjkhrmqd3ey73dp9n5y5yvyzcs64acc9g0k2epcpwwyya4spvhnp8 has excellent tutorials on pretty much all of this and more btw