The drawback is the fact that changes to the commit history of the master branch are often rejected by tools like GitLab and GitHub due to the possibility that a master git rebase can negatively ...

I can't merge changes from master because there isn't an initial commit yet. If I commit, it overwrites (?) master and I can't merge changes into the past; everything is overwritten.

To really understand distributed version control, you must master the Git status command and understand the working tree states upon which it reports.