No problem! I feel the same, this is also my first drone after being quite into photos/video on normal camera that don't fly! So I'm just getting used to the flying mechanics aswell, but really enjoying it so far.
I feel your pain with the overcast conditions, rare that the sun comes out in Scotland! When it's cloudy I'd recommend setting your white balance to cloudy since it'll warm up your image abit. I'd avoid going too heavy on the saturation since as you say it ends up looking quite unnatural.
I'm by no means an expert, and also just a hobbyist but in terms of main properties to adjust I'd start with making sure the exposure is correct. The histogram will help with this, which is basically a graphical representation of true blacks and true whites in your image. I'd start with pulling highlights down and shadows up, since this will likely bring out the sky better and bring out details in darker areas of your image, it will also add contrast. You can also do this by messing about with the contrast slider. In terms of colour, it's really just a personal preference and a case of tinkering the image until you find a look or style you like, there's no set way to do it, it's all about being creative I guess!
The colour tabs also allow you to add in specific colours only in shadows or only in highlights, for example you can add saturation to only the green part of the image without affecting the rest. A popular look is changing the hue of the green to an orange tone and the blue's to a more of a teal. This creates the much used 'orange and teal' or 'blockbuster' look as it's sometimes referred to. Best advise is youtube is your friend here, loads of good Lightroom tutorials and loads of amazing free content on there! You can also get preset packs for Lightroom which do alot of the work for you and you can still get good results.
For example here's the raw from the
MA followed by the image with abit of added contrast, dehaze, highlights brought down, saturation increased and some reds added to the midtones:
View attachment 30798
View attachment 30799
Best of luck!