Yes it can be added with Luci.
Back up what is working for the most part.
You can look for the pkg called travelmate and then reboot.
It should show up last in system or network. I have not used it in quite a while.
I looked up the support thread for you.
This is the recommended build for your pi3
https://firmware-selector.openwrt.org/?version=22.03.5&target=bcm27xx%2Fbcm2710&id=rpi-3
I used this to get a good build on the Pi4b but I chose your pi; choose builds. It is going to add a lot of features.
I recommend this because I do not like CLI either and I can add the drivers for the wifi card I use for the wan just by adding it to the script.
Depending on server traffic it can be 2 minutes to add the packages or hours. If it says it is building leave it alone it will, eventually, finish.
I should add I do not need travelmate because my VPN, hotspot shield, loads on the device. But it will tunnel.
https://firmware-selector.openwrt.org/?version=22.03.5&target=bcm27xx%2Fbcm2710&id=rpi-3
I'm presuming you know how to disable the config for your home, search for APs and add them.