If I pull in all the custom data fields into the report and upload it, where is it uploading to? it's not clear in the instructions. do I need to create a specific portfolio, program? Please send me a link to a video tutorial on kickstarts so i can watch it. I don't like that I have to do all this training to understand how to upload data.
When you use a kickstart, you are creating new records somewhere in Workfront. It's not just a disconnected Excel sheet hanging out with no context. That can be a set of tasks, issues, projects etc. It uploads to wherever you code it to upload to. If your form is a task-level form, then you could design a kick-start to create X number of tasks in a project and load your data into the form fields attached to them.
But from your comments earlier about wanting to interact with it like an excel sheet, I don't think you're going to get the functionality you expect here. A report isn't a random collection of fields, it's a list of records and you have to create those records to have somewhere to store your data. It sounds like you want to simply upload an XLS file to the Documents area and then be able to open it in the browser to edit, which is not a supported feature of Workfront. The data has to be in a Workfront record of some kind and it won't be an Excel doc anymore.
@madalyn_destafney has provided you the correct documentation, and to my knowledge that is the only documentation Adobe has provided. I have never seen a tutorial video.