@Laura_POLO typically with a thread this old your question should be a new thread linking to this one for reference. Also including any attempt on your end shows effort and will encourage others to assist.
If you haven’t, please review this thread: https://forum.dynamobim.com/t/how-to-get-help-on-the-dynamo-forums/4677
That being said I will provide a few images for assistance, if you have further questions make a new thread with sample files and your description of the desired end state.
I would also suggest you read the blog post (it has pretty much all you need to get started, that’s how I started. Thanks @Mostafa_El_Ayoubi for the documentation) referenced above and here:
This is one way to ask for a file name and make sure it has the proper file format prior to writing data via one of the many write to excel nodes. (Hint: some nodes may require the file to exist and some may allow creation of the file with the file name.)
The Inputs can be grouped together in a list of inputs for a single dialog box, or you would have to use multiple MultipleInputForm++ nodes to have subsequent dialog boxes asking for different information at different times.
There are so many good nodes, open up the package in dynamo and start placing them and reading the descriptions.