I don’t want to expose my actual macid and isp while using vpn. Please help!
The above answer is incorrect in the sense that it does not get forwarded beyond 1st hop. So only your home router knows your Mac address. In fact android, iOS have random Mac address generation.
As for Mac address of your modem - then only the ISP would be aware of it.
No. Mac addressing is done at layer 2 of the osi model. Websites operate at layer 7. They can see down to layer 4 which is IP addressing. For a tutorial on how computers communicate on the Internet check out the free preview of VPN Essentials
At least on my win11 laptop, it comes with windows. I think it is in settings > network & internet > wi-fi (random hardware addresses). I do believe win10 will do it too.
You can do it vie powershell
netsh interface set interface <adapter name> newmac=<new MAC address>
Or apps like Technitium MAC Address Changer.
It only really makes sense if you routinely connect to different networks via ethernet and want to hide you mac from them for whatever reason.