Pips_23 is right - learn to write in Cyrillic. I created a long comment discussing how to load and use the Russian Mnemonic Keyboard in Windows 10 at: https://www.duolingo.com/comment/27236556
There are many similar keystrokes between Cyrillic and Latin alphabets, so you don't have to start from an absolute beginning. For example, to type the Cyrillic "d" = д, your press the "d" key. Cyrillic "r" = р, you press the "r" key.
Of the 33 characters in the Russian Cyrillic alphabet, 19 of them correspond directly to English letters on the keyboard. That leaves just 14 new keystrokes you have to use.
I am able to now use my phones physical keyboard to type the Cyrillic! Only the 'c' key matches the latin's position; there are zero visual prompts; some of the keys require multiple presses to select the correct letter as there arent enough to contain the entire russian alphabet and I haven't even looked at a single keymapping diagram.
In short, i learnt how to use it so fast (starting with random guesses) because I made it a necessity for my brain and my brain acted accordingly.
Tldr: If you give yourself no o®her option, it'd take you less than a week to learn to type Russian on a computer keyboard.
What do you base those definitions on?
A context search of both words shows that началник means "boss" or "chief", but that директор means about the same thing as it does in English: the head of some group who is charged with operation of the group's affairs or business. That would include a movie director, I suppose, although in English that's a specialized meaning for the word "director". директор also seems to mean "principal", which in English is the person in local charge of a school. ("Principal" has other meanings, but they are not well-translated by "director".)