Why is the vagrant environment not working?

Question

virtual box

Do not take it for impudence, but I ask you to help me understand Vagrant and with its further implementation, since I have been unable to understand what the problem is for the whole day, and the problem is practically at the very beginning. I tried to do everything according to the rules, installed a virtual box, vagrant was installed normally. Uncommented line 15 in vagrantfile - config.vm.box = "generic/ubuntu1804" (according to boxing), line 26 - config.vm.network "forwarded_port", guest: 80, host: 80 (changed as advised on one video 8080 -> to 80 at the end of this line), and line 46 - config.vm.synced_folder "C:/Users/Kero8yte/Vagrant/projects", "/var/www" (changed the paths and added a new directory projects in the folder with vagrant).

Vagrant.configure("2") do |config|

  config.vm.box = "generic/ubuntu1804"

  config.vm.network "forwarded_port", guest: 80, host: 80

  config.vm.synced_folder "C:/Users/Kero8yte/Vagrant/projects", "/var/www"


end

Next, vagrant reload - wrote that everything went well. I generated a private key in putty, set the address to 127.0.0.1 port 2200 as indicated in the terminal. At startup, I enter a login and for some reason it requires a password, but I didn’t set a password and, as it was shown on one video, it immediately went into a message about a successful launch. I enter the password the same as the login, it starts up without information, after the sudo apt-get update command it writes errors and does not update anything. I already started writing a question here and at the same time I tried in the hope of launching it again, and suddenly the download started after several errors, but in fits and starts,I had to run the same command several times. I was delighted and started installing other tools, in particular python and django. But as soon as I restarted the computer when starting vagrant, for some reason the address changed to 127.0.0.1 port 2222 and again nothing updates, writes errors. I immediately thought that one of the reasons for the unstable Internet, but still I think it's not. Help please, otherwise I need to deploy a program with a database at work until Monday, but I can’t even do that. I am still a trainee, but I still really want to stay in this job in the future.