Hello and welcome to OpenStreetMap Christina,

every bit helps :)

You requested a review of your changes. I'll try to give you some feedback while giving some background in the hope that it helps and you may find the time and joy to keep editing the map according to the reality you survey.

You used the built in editor of the osm.org website which is called iD. Like every piece of software it has it's pros and cons. One of the drawbacks in my mind is it's tendency to snap nodes to other nearby nodes or ways (a way in OSM is the connecting line between two nodes) thus connecting them. This is nice in some cases but it's not so good when it happens near borders or other features that shouldn't be connected. So, when drawing objects, please look out where you put the nodes and try not to connect them to features that aren't supposed to be conncted (you can keep "ctrl" pressed while setting nodes to suppress that snapping feature).
(I already went ahead and disconnected the landuses from the powerlines and borders)

The current aerial images are good enough to trace objects with a bit more detail. So don't be shy, add curves where they are needed so objects don't overlap on the map where they don't overlap in reality.

Your changeset (CS) comment already looks alright and you gave a source for your changes. Great. Keep that up.

The tags you chose for your landuses also look alright. Maybe some "grass" may be a "meadow" but that can be changed easily should need arise.

Should you have any questions, please don't hesitate to reach out. Either directly or through one of the channels I'll link to at the end. The UK should have a pretty active community eager to help.

happy mapping
silversurfer83

https://wiki.openstreetmap.org/wiki/Good_practice
https://wiki.openstreetmap.org/wiki/Beginners%27_guide
https://wiki.openstreetmap.org/wiki/How_to_map_a
https://wiki.openstreetmap.org/wiki/Contact_channels#Chats.2Fmessengers