Setup site to site VPN with TP link er605 routers and starlink

I have an upcoming upcoming project that I want help with. I need to establish a site to site vpn from my home office to a remote location. My home office has a dynamic ip from ISP however I have purchased a vpn static IP. The main location has a tplink er605 vpn router connected to to my home network router via lan(main router) wan(er605). The remote location uses starlink so it is CGNAT, behind the starlink I have a TPlink er605 vpn router and several switches. I want to establish reliable vpn connection where I can access the remote sites network(starlink) from my home office. I want to ensure that this vpn connection seperate from my home network and does not compromise any security on my home network