Is it worth getting a commuter pass?

Yes, it can be much cheaper depending on the length of time you choose. It also saves you from filling up your card all the time. If you can read Japanese, use this link https://www.navitime.co.jp/transfer/pass/ and put in your starting station and ending station. it shows you the cost of teiki for 1, 3, and 6 months. You can add a transfer station at the bottom part if you have one. If you decide to get one, go up to a machine that says 定期 at your station or even faster, ask the staff. They'll walk you through it. The machines also have an English option too.

I don’t know if you mean the card or the app, but they do have an app for the cards/teiki now. You can transfer money to it pretty easily too.

Everything they said above. But remember, only get it for months that matter. Like...are you still going to work this month every day?