Hello and welcome to OpenStreetMap.
The footpath you added does not look quite right. A lit public highway (footway) would not normally go through a building terminating at its front wall.
Is there a passageway through the building, if so it needs to be added?
Does the highway carry on to join High Road as you state in your changeset comment, if so it needs extending?
Or is there a walkway of some sort going through the building which is not a public way, in which case the footway would stop at the front and back of the building, and usually the front way would not be marked speciffically as it would be part of the High Road sidewalk?
If you need help with any correction please just ask.
Regards Bernard

My apologies for not welcoming you to OpenStreetMap. Welcome to OSM!
I wanted to explain that this section of Mapletree Lane which is part of St Peter's Way is included in relation (#140,533) specifically for the way. Therefore your addition of the footway is unnecessary and is also a duplication of the highway, two highways on the same ground sharing the same node points).
I've just made sure the section is properly entered in the relation then removed the duplication.
No harm done, little mistakes are all part of learning. You've made a very good contribution to OSM with the several new cycleways you added.
Regards Bernard

Hi, removed the sidewalk tag, sidewalk is beside vehicular highway.

Hi, a sidewalk is a footway beside a vehicular highway so I've removed the sidewalk tag.

I have tried to find the address where your studio is situated without luck, it's not on your website. If you could give an address I might be able to help get your business onto the OSM database. OSM only maps what is verifiable on the ground.
Regards Bernard

Hello and welcome to OpenStreetMap.
I have reverted your changset that removed a bus route relation detail by changing it to a studios details.

Way: 507335422
Removed self intersection, tagged courtyard

Way: 520419510
Hi, I fixed a self intersection problem on this area outline.
Also changed tag to fell, you state it is fell which I agree but then tag wrongly as heath. The fell tag does do something it tells the database the area is a fell area not a heath. You can render fell areas.
Regards Bernard

Hello and welcome to OpenStreetMap.
I've amended the building levels to two for a semi detached house. 2 living levels, 1 roof level as per osm.wiki/Simple_3D_buildings
Regards Bernard

With just a name the feature would not be rendered, I've dded the building and a few more details.

Way: 519344354
Hi the tagging value green is not usually used with the key landuse. Can you explain what you mean and possibly amend the tag?
Regards Bernard

Hello and welcome to OpenStreetMap.
I have changed the Westminster Abbey website back to point to the sites homepage rather than the Japanese welcome page. Like this anyone clicking on the link can choose the page/language they wish.
Regards Bernard

Hi, skate board area detail tagged to the area.

Hi, again "Double bus stop" seems like a description rather than a formal name.
If you take the information stated on the bus stop signs you can add the information so the OSM database can recognize it. How to's are on the web, also a good thing is to look at how others have formally mapped bus stops.
Failing formal detailed information then highway=bus_stop will render correctly on the map. Regards

Hi, I wonder if "Woodslide link picnic area" is actually a name or really a description, if it's a name then each word ought to be capitalised.
Same with the POI, "Woodside link Picnic benches", is this a name?
Also your POI states a park as well as the area stating a park, this duplicates the park name on the map.
If help is needed please just ask, regards Bernard.

Hi, the cycleway is connected to a stream. Does it cross the stream or should it not go there?

Hello and Welcome to OpenStreetMap.
I just wanted to let you know that you've somehow duplicated parts of the footpath across Wheatfield Green. Also is there a zebra crossing over Wheatfield Rd, if so then that needs also to be corrected to OSM best practice.
If you need help adjusting this please just ask.
Regards Bernard

Way: 516616957 fixed several self intersections

joined the two buildings at south

changed area=yes to building=yes