I would very strongly recommend checking out Tailscale. 

https://community.umbrel.com/t/how-to-use-tailscale-with-umbrel/6782

It is one of the easiest ways to have a secure connection to your home servers, and you won’t have to punch a hole in your NAT at home. 

Going to tag @Ava in here to double check I’m not giving bad advice. 

 Thank you!