If you fear that people from your workspace will access your home PC, then VPN with the usual settings does not allow communication between your home network and your workplace's network. When you connect to your workplace with your VPN client, your home network becomes hidden for your computer and people from your workplace cannot access any computer from your home network. It works by design this way. Even if soembody could see your home PC from your workspace, they would not be able to access it unless you have a server application running on it. For example Windows file shares, FTP server, etc. are needed to see anything. And even if they can see these servers they need to guess their password. Ofc. it is possible to monitor traffic, especially if it is not encrypted, but it would be a little bit paranoid to think that your employer would break into your network and spy on you. But if you insist then many routers nowadays have guest network, so you can add your work PC to that and keep everything else on your local network.