ARC works/doesn't

Roon Core Machine

HI SUPPORT: first at first glance I really like ARC KUDOS to your engineers !
ARC works great(sometimes and ROON is on on my new 2021 Mac mini M1 with 16 GB RAM)in my home in my vehicle it sometimes plays sometimes it doesn’t or says"POOR CONNECTION" or “OFF LINE”-- in my office it’s iffy
there appeared once under settings or that cogwheel icon “to download” now it doesn’t appear at all so there is no way to download and in COMMUNITY someone or you alluded to fact you can only download from your own playlists or albums is that true?
all my playlists are there and a selection of albums ect and of course TIDAL/Qobuz
My router is Spectrum WiFi 6 Router with both WiFi and Internet connected.
How do I know if port forwarding is enabled and UPnP or that NAT is on and if not how do I do it–everything I lookup or read is far beyond my intellectual capabilities and your suggestions are far too technical for me–isn’t there something simple to do all this?
BTW in my vehicle’s Alpine sound system and my iPhone 13 Carplay works and the SQ is great far far better than Siriusxm but if I drive away from my house it stops.
Appreciate yours or anyone’s help–am sure you are having lots of ‘bugs’ and I am very patient it’s not the end of the world good work!
My system is very simple the mac mini m1 the spectrum wifi 6 router other connections are for in home listening and always work perfectly–Schitt YGGY GS newest one and Rggy 2 just the amp also use occasionally explorer 2 DAC
pretty much same as @Dean_K above

Networking Gear & Setup Details

Spectrum WIFI 6

Connected Audio Devices

all USB mac mini 2021 M1 16 GB RAM
Explorer 2 MQA DAC(infrequently)

Number of Tracks in Library

30000 track 4200 albums and hundreds of playlists using both TIDAL&Qobuz

Description of Issue

see above