re: I think I need to block this board for a while...

Even if the chemo prevents you from getting outside very much, try to have views of the sunshine. Maybe car rides on country roads with good music.

Also as much exercise as possible. A lot of good youtube exercise videos-- everything from very light workouts to peleton-type bike vids-- are avail to keep you company during home workouts.

And don't be hard on yourself for feeling depressed at some of the scenes we've been treated to by the news. It is depressing. You are on the right track to tune it out.
There are many more good people out there that never make the news.
See if there's a way to connect with them. Even if it's just a distant thumbs up to a neighbor working in their yard.
Pat yourself on the back for little steps to take your surroundings back into positive territory. Godspeed.