Hi,

Welcome to Openstreetmap -- help is always much appreciated.

A couple of things to get started:

1) Try to make small changesets so people can understand what you do.

2) Don't do changes that you don't understand (yet).

Some things are straightforward in OSM, for example creating normal buildings

Other concepts are rather complicated and require a lot of experience with OSM, for example public transport routes.

Try to start easy and build up skill gradually. You made some changes to bus routes which seem incorrect, for example you added the tag public_transport:version=2 to https://www.osm.org/relation/7489858 But this tag is wrong (the route does not adhere to the PTv2 standard https://wiki.openstreetmap.org/w/index.php?oldid=1550843)

Anyways, welcome once more and happy mapping!