Step by step, with the forms named and the deadlines that matter.
Filing is mostly paperwork, done in the right order and on time. You report the injury to your employer, your employer notifies their insurer, and the insurer then has a fixed window to accept the claim, deny it, or ask for more information. Most of the delays we see come from a form that was filled in quickly and then had to be corrected.
Keep a copy of everything you send and note the date you sent it. If a deadline is approaching and you have not heard back, that is worth chasing rather than waiting politely. Bring what you have to a meeting and someone will go through it with you.