(I am currently using ExpressVPN, but regardless what name it is I think the issue that I have will still apply)

When use a VPN:
1) there any settings that has to be changed to the ISP's router, connected to the PC, in order for (my) ISP not to see my activity (i.e. downloading /uploading, and how long) ?

2) or just simply chose a location on (in this case) Express VPN location - "smart location" or any other, but not yours ! (This being only for the purpose of copyrights, basically ISP not to know what someone is downloading, but still seeing how big of a file how long /in time ? Thus changing anything in your router's settings for that purpose, wont help !? )

(Notes:
- Months ago when I was new to torrenting, I left my Torrent Client (utorrent) open 24/7, thinking that since I use a VPN the ISP wont be able to see my activity. Later I received a letter, saying to check my connection, in case someone else is uses my IP address. If it continues, they will disable my account, even tow, is "unlimited" download when I signed-up, or so I thought.
- that is why (in my thinking) I asked above, if any changes in router's "setting" provided by ISP provider ??? )
just confused

Please help