I’ve watched Sabine for awhile, she’s a really great science reporter who keeps things simple and pretty brief. Just a note though, I feel like she sometimes takes very skeptical and conservative views on some subjects where she doesn’t really have any expertise. It also makes me kind of uncomfortable how she seems to be obsessed with Elon Musk, she mentions him in basically every video.
Despite all that, she’s pretty great, check her out, just keep in mind she talks about a lot of things she isn’t an expert in.
I think upgrading the RAM as you mentioned is going to make a big difference. While the physical RAM might be soldered to the motherboard, you could buy a fairly cheap SD card or USB and set the system up to use that as virtual memory. It won’t be as fast as actual RAM but it might help and large SD cards are honestly really cheap these days.