How do I boot directly to tty1 in ubuntu? [duplicate]

Find GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub (with a sudo nano /etc/default/grub and change it to ...

GRUB_CMDLINE_LINUX_DEFAULT="text"

and update grub with ...

sudo update-grub

Tell systemd to not load the desktop with ...

sudo systemctl enable multi-user.target --force
sudo systemctl set-default multi-user.target

And the initial boot will end up on a tty. By default it will be tty1. You can still go to the desktop by using the command startx on commandline.

I should also be able to switch to the graphical desktop using ctrl +alt+f7 in case I need it.

You will need to issue the sudo systemctl start lightdm command before using control+alt+f7. Probably impossible to get around that: if a desktop is loaded during boot it will take precedence.