This sheet works largely on its own, however I've also written a lengthy setup guide for The One Ring in Roll20.
The roll buttons assume you have a number of rollable tables (feat, lm-feat, normal and weary) setup, as described on the Roll20 Wiki page for The One Ring.
This is in fact three character sheets in one. A full-on Player Character sheet and two Loremaster sheets meant for allies and adversaries. Two two former use the feat table for rolls, and the latter uses the lm-feat table (and has Hate instead of Hope).