What to remove from this watch when down in MB teritory for capasity?

Well go to each one and see which you will never use. Walky Talky is one I never use. Make sure when you download apps to the phone there is not similar to the watch. Also remove faces that you may not use. Podcast if you never use it, short cuts also and keep searching. Make sure you configure your watch to save battery. Check AppleVis for battery tips on the watch. Hope someone did a podcast.

I never use tips and if you are not planning to use it you might want to delete it. Also mindfulness. If you delete them, do a restart. Hope things go well.

If you don't want as much music, then delete it, no it shouldn't go away from he iCloud library. then again i have a love hate relationship with that stupid thing. Walkie talkie is cool so I kept that and mindfulness is one of the core reasons I bought the watch. Look for things like notifications like Uber or lyft, i use them both but they don't have apps for the watch, don't know why, so that might be something to consider. also, you might want to completely reset the watch to defaults, start all over so you know what you are putting on the watch not what it thinks you want. again, if the battery health is poor, that might be another reason to at least see how expensive it would be to get a new battery or like i said, look for sales and deals on a newer model, even a series four or later would work better. good luck.