I found Nginx Proxy Manager to be the easiest to configure when I was starting out my homelab! I think the GUI played a big part in that, but it's also just pure NGINX under the hood, so when you get more comfortable with the concepts, you could easily transition to that for even lower overhead (welp, I just had a look at my docker stats, NPM is sitting at 3.2 MB of ram with ~10 proxy hosts, not sure how necessary that even is...)