Security http: vs: https:

Sorry for the total noob question here but I’m very new to HA.

I understand the basis premise of http: vs. https:

I set up HA 2 weeks ago and have set it to have a static IP address

My question is is this “secure” since I can access it on my devices connected to my home internet network using that IP address?

I know setting up Nabu Casa (which I just did today) creates a https:// address to access things remotely but, do I need to do anything else to “secure” things at home?