As it is not easy to work with step Numbers instead of Note-Names , especially when trying different base keys, i was searching for an easy way.
Now i created quick and dirty a excel macro that can help.
In A3 you select the basic key with a dropdown field.
In Column D you select the Notres you want to hear, when playing the note in column C.
Press calculate and you get the interval numbers for each step number.
i had problems myself on a compuer with libre office.
i had to alow macros in the security settings. Took a longer time to find out, as there was no error message when hitting a button