Hello and welcome to OpenStreetMap :)

I would like to give you some information / help to make future contribiutions by your hand even more valuable to the project:

- please write a change set (CS) comment based on what you actually did in the CS at hand. All your 5 changes yesterday have basically the same comment while you actually did very different things. For details please see this article: https://wiki.openstreetmap.org/wiki/Good_changeset_comments

- in this CS you worked in Paderborn and in/around Dresden. Please save your changes before changing places like that. For reasons, please see here https://wiki.openstreetmap.org/wiki/Changeset#Geographical_size_of_changesets

- this parking space (https://www.openstreetmap.org/way/1182077401) looked very much like it was already mapped so I took the liberty of removing it.

- this building: https://www.openstreetmap.org/edit?editor=id&way=289857347 please choose a different background image. For NRW please use "NRW Orthophoto" which is the best available aerial image in that region. You can then fix the building and add the small one to the west of it. When tracing buildings, remember that most buildings are actually square. You can fix your angles by clicking the button "Q" after selecting an object. Try it.

Here are some more helpful articles in the wiki which I really recommend reading when starting out with OSM:

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

Please reach out with any question you might have

cheers
silversurfer83