Hi Lorraine,
I was also a Quicken user when I found Tiller in 2019, and started using Tiller exclusively in 2020. I also really wanted that Quicken style register with a running balance including future dated transactions.
Here is my solution that I am still using today. Read through the discussion in this thread and see if you want to try implementing this. The main key is having someplace you can reference an initial opening balance for the account.
Let me know if you have more questions about this.
Martha