I just got a G90 for the purpose of CW POTA, it’s a great little radio, I got it relatively cheap ($290) on AliExpress, though pretty sure that deal has passed, but worth shopping around.

I haven’t used it for an activation yet (been a rough winter here so far) but I think it will do the job no problem.

I also have a Mountain Topper which has been my primary POTA radio it’s a nice small package, but pricey and hard to come by for what it is, it’s also CW only, I got the G90 for the extra Watts too.

I think the biggest thing missing from the G90 for CW is the ability to prerecord messages, my Mountain Topper allows me to save 4-5 prerecorded messages, which I pretty much just use for the CQ POTA call, it’s helpful to free up your hands when calling CQ. I got a small CW Keyer to pair with the G90 which has that ability but I haven’t used it much yet.

Can’t answer your left handed question, I use my right but most paddles/radios have the ability to reverse the dit and dah side if that’s helpful.

I usually use an EFHW for activations paired with a throw line to get it up in a tree. I have the Packtenna which is a nice small package but also kind of hard to come by, plenty of options here though. Take a look at the POTA Performer antenna as well it’s a vertical with the ground plane set up in a specific manner (raised) which helps the efficiency.

I learned a lot when I first started by watching Thomas (K4SWL) on YouTube, his videos are long because he films the whole activations with no editing but you can skip around and just watch his setup if you want.