How to distribute & receive fillable forms to Reader users in Document Cloud?

I am new to Adobe Acrobat Pro DC, although I previously used an old version of Standard extensively for creating forms.

I have a group of Word documents that I am converting over to PDF fillable forms.  Because of the number of forms and size of the converted documents, I want to avoid using email.  I have been playing with the program and have figured out how to share multiple files in a single Document Cloud link that I can email.

My issue is this, the recipient of my documents & the link very likely only have access to Reader.  I need them to be able to fill out the forms, e-sign and return them to me through the cloud instead of email.  Can the forms be completed in the cloud or do they have to be downloaded?  If they have to be downloaded, how do they upload them back to the cloud to me?  I don't have the option of a lot of trial & error playing with this process.

Any help is appreciated!

Thanks!  Connie