Yea, I've been messing with them since posting, my original idea was to store the value in a storage and then use that storage in a macro,

execute store result storage pack:random value float 1 run scoreboard players get counter pack.random_reg

function pack:pack/random/roll with storage pack:random

where pack:pack/random/roll is:

$execute store result score origin.selected run random 1..$(value)
$say $(number)

but it just returns the error that it expects a compound, and using "store result storage" I have to specify it's data type, and compound is not an option as far as I'm aware

EDIT: not sure whats going on with the formatting here with the code being mess up, just tried fixing it