Some ‘getting started’ suggestions:
Telnet BBS Guide has over a thousand BBSes listed, most are accessible by telnet. Syncterm is a great terminal program for BBS use, with Linux/Mac/Windows versions available. Other telnet clients can be used, but many BBSes use ANSI and CP437 and not UTF8. (other BBSes use other standards like ATASCII or PETSCII, Syncterm supports many of these.)
There are a bunch of interesting BBSes, one I’d recommend is 20 For Beers, connect to it at 20forbeers.com:1337. Plenty of great ANSI art and active message areas and a huge file collection too. I also recommend checking out the fsxNet message areas, they are shared across many BBSes and have an active community.
For my Samsung 85" TV, entering the wifi password was a requirement - without wifi access, several weeks after installation, the TV stopped displaying video from any input. The only solution was to enter the wifi password, at which point the TV immediately returned to normal operation.
Just because it appears to be optional to connect the device to internet does not mean the basic functionality will work.