From a freenom domain to my ESXi host, through a dynamic IP.

I'm looking to use a domain name to access various guests on my box, depending on what port they connect to, so I can have RDP access my Windows 10 VM, and SSH hit one of my Linux guests, all set up with certs if possible with the domain. However, my router only allows connection to/from one of three dynamic providers, DynDNS, noip and dyns. Can I do this with port forwarding instead? Or a VPN between the two machines? How do I set up the DNS record for this? This is what I have for DNS on the domain, https://i.imgur.com/d5H4cAL.png

I have a feeling I'm missing something here, how does the domain know what the IP is, or can I run something my end to enable this?