Help reproduce a high level project plan in a nice spreadsheet

I am looking for someone to help me with some project management admin. I'm running an outcomes-based programme where the outputs are much more fluid but we still need an overall plan for our first year. it is based around 3 work streams that have responsibility for their own work plans but these need to align with the other workstreams. We've tried using Monday.com but at the moment it is difficult to see and understand the overall plans and how things relate. We are getting a bit stuck in the task 'weeds'. I want to try creating a summarised plan, beautifully designed up in some spreadsheet and the multiple tasks can still be held on Monday.com. The info for one workstream is mostly missing, so we need to be able to easily input when it becomes available. The other two plans are expressed in different ways, that will need alignment but needs to stay in the language that makes sense to each stream as well as 'outsiders'. I want it to look nice and easy to understand at a glance.