IfIDieIWasAFK

I'm new to forge but have been modding for a while, but don't really understand how to do so. I extracted forge into the MCP folder, and tried the FernFlower and everything else because it wasn't working, because of the missing client jar. This is what I get. ================ Forge ModLoader Setup Start =================== Setting up MCP > Restoring commands.py backup Patching file C:\Users\Username\Desktop\MCP\runtime\commands.py patching file commands.py Commands patch applied successfully Copying FML conf Fixing MCP Workspace Could not find Client jar, decompile requires both client and server. Decompile Exception: 1 Press any key to continue . . . Sorry if this is an easy fix and/or its been posted already, I just really help and couldn't find any anywhere else.