Networking expert with openvpn

I am looking for a networking expert with experience in OpenVPN to help me set up site-to-site connectivity for my small office/home office (SOHO) network. My main goal for implementing OpenVPN is to establish secure connectivity between my various office locations. my home office has a cellular internet so it does not have a public IP. The router has an Open VPN in it. I need to connect to my office so calls from the wan will be able to be routed to my home office. even though it has no public IP. I need the expert to ensure that the setup is on and reliable, and that it can support up to 5 remote users who will need access through OpenVPN. The ideal candidate should have experience in networking and VPN technologies, and should be able to provide recommendations on the best setup for my specific needs. he will have to work with me on anydesk