init repo on local machine and first commit

git init
git branch //maybe not need??
git checkout -b master //for master branch!!
git add *
git commit -m 'commit'
git remote add origin ssh://.....
git push -u origin master

ssh settings in ~/.ssh/config for new ssh

Host *
HostKeyAlgorithms=+ssh-rsa
PubkeyAcceptedKeyTypes +ssh-rsa

change default branch

git config --global init.defaultBranch