Hello! Welcome to open street map!

One way to get features looking super crisp is to use the "square corners" feature in the editor. Select an outline and hit 'q'. The edits here could benefit from this treatment. 

The church outline could be tighter to the building. I try to follow the roofline to make the shape and then align it to the foundation (sometimes the aerial view is skewed a bit... but the aerials look great here).

The name field on the grass by the church is probably better left off or move to a "description" tag. See: https://wiki.openstreetmap.org/wiki/Names#Name_is_the_name_only

Anyhow, feel free to ask if you have any questions. Happy to help.