Hello, and welcome to OSM.  Couple things.  

When adding buildings (or other rectangular/square features), you can press "Q" on your keyboard to square the corners and give them right angles.

Also, when adding the address, be sure to input the correct info in the correct fields.  Zip code should be in zip code, housenumber in housenumber, etc.

I went ahead and made the changes for you here.  I encourage you to take a look.  Let me know if you have any questions.

https://www.openstreetmap.org/changeset/159685389
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            Published using OSMCha: https://osmcha.org/changesets/159683123
            