Switch HC online questions

Hi all!

After coming back to D2 via Switch and messing around a while in offline softcore, the (very!) intermittent hardcore itch is returning. So I've decided (for reasons even I don't fully understand) to try an HC ladder character when the season launches. Now I'm trying to figure out what I feel like I need to know before that, and I'm still slightly lost. Any input you have on the following questions would be greatly appreciated!

For what it's worth, I'll still likely play almost entirely SSF. Few of my friends are playing it now, and only PC SC. I don't currently plan to engage very much with trade, maybe buy/sell the occasional uniques/runes or bulk jewels etc., but that might change with time.

1. Is there even much of a Switch HC Ladder community to begin with? How/where does it function (e.g., here, reddit, Discord...)? How badly is trade affected by the population?

2. What do I need to watch out for online? (Used to play a ton of PoE as well, occasionally HC, so I'm not worried about basics like trade scams and keeping my butt in town with unknowns, but not sure if there are D2R- or Switch-specific things I'm missing.)

3. What all can trigger d/c on Switch? Obviously shitty Wi-Fi or servers; didn't even think about sleep mode until I was testing a bit with an HCNL character and set it aside for half an hour. Is there any kind of server-side logout timer or the like that I should also look out for?

Thanks in advance for your input!