You can get yourself a vanity key using https://github.com/AlexanderYastrebov/wireguard-vanity-key tool:

   % wireguard-vanity-key -prefix=NAS/
   private                                      public                                       attempts   duration   attempts/s
   EiBsDB8zt/G4+VWGvxW2ZznNXYmcslcIyJimNR2PpF4= NAS/aex8+IFzLePBYVNGMsSo/1/XeUZcam+Hn8wbNB4= 22619537   0s         112587360

Wireguard is cool, but there's some reasons it's worth considering OpenVPN (why I still use OpenVPN anyways). First, OpenVPN has kernel mode now (called DCO, which I think Netgate maybe has upstreamed to FreeBSD); I've found it's performance on hardware with AES-NI on Linux is actually often better than wireguard. Second, there's a lot of quality of life things that just work on OpenVPN that you've got to use a ton of duct tape to make work with Wireguard, a major one being handling DNS record change (think especially dynamic DNS, which is likely if this is IPv4 and a residential connection). This is a huge pain with Wireguard, but just works on OpenVPN. Similarly if you have multiple WAN links, like I do, for OpenVPN it's just two connection stanzas and it largely just works. Again for Wireguard you're adding lots of duct tape to make it work right. I know Wireguard is the new hot thing, but it leaves a lot to be desired in the resiliency and features department.