Happy New Year to you too !!
The main problem with putting live plants in with your goldies is that they will eat them or uproot them.
I have live plants in with mine and have avoided the uprooting problem by planting the around some pieces of bogwood and so far........no probs.
They have eaten a couple of the lants a bit, but by no means decimated them so that doesn't bother me.
As far as fake plants go, you can get some really good fake plants - silk or plastic - that look great in the tank.
The only reason I have put real plants in the goldies tank is I had an algae problem that I thought might be less if there were a few plants in there, and I had some plants left over after planting the tropical tank.
Have a look in here
https://tropicalfishfanatics.forumotion.com/your-setups-f18/mary-s-coldwater-tanks-t82.htmat Marys tanks which have fake plants and looks really nice I think.