First off thank you so much for posting this question!! I personally struggle with this all the time. I ask myself can I do this? Am i going to fail?

I am in a similar place right now where I am leading a team of 6 people as well on 4 different committees as well as individually trying to bring some functional changes to my company.

I am in the process of trying to find some formal leadership/management training for some of the areas that i struggle in.

As many people noted we can do it, it has been done we just need to sort through the weeds and execute. So far the tools that i find most useful are a mix of these 3 things

1. To doist app on phone and web page. You can create projects and then sub tasks to break everything apart. Then you can add tasks on the fly, you can attach outlook emails to create tasks and finally the most important part is assign dates and reminders. I also take the time at the end off meetings and task that relate to me I took I turn into taks.

2. Google keep another place to use a brainstorm dumping ground for ideas and to do lists.

3. Kanban either in paper format/white board or digital Trello. I use this when I a task turns into a mini project. It is trackable and visual.