Well you might need to just reinstall your OS to fix that.
After you installed your OS, install SSH
sudo apt-get install openssh-client
and FTP
sudo apt-get install vsftpd
The other thing I like to do personally is enable the root user and allow access with said root user through ssh and ftp. You will need to manually edit the config file and restart the service.
Just make sure that you make a good password for root if you care about security.
One last thing is to set a dedicated ip for your machine in your router settings if you haven’t done that already.
This way all you need to have is the power plug and an ethernet connection and you’re all set.