Me! 👋
Don't Skip The Docs.
For emacs tips, start at https://hledger.org/editors.html#emacs.
Don't assume you need hledger-mode (ledger-mode also works well, I use it).
With flycheck-hledger (or a VCS precommit hook), don't feel you need maximal error checking - do what's most useful now, you can always do stricter checks manually.
Don't try for perfect accounts/files/workflow up front - expect evolution.
Don't limit yourself with an ancient hledger version - get the latest.