Hello! I`ll try to provide answers:
"Does the excel file has to be in certain format or anything?"
Yes (as you may expect..). You can create the needed format by exporting a process to excel.
"no providers came up, does that mean the database doesn`t have the info for it?"
Yes, then the database you have does not contain processes which produce / provide the products you need in your process.
"Which is the database i should be using then (free database)"
A database that contains the product you need - to find this out, the product search on openLCA Nexus is probably useful.