Confusion over the use of practice and practise is common. For most varieties of English, practice is the spelling for the noun and practise is the spelling for the verb.
I practise every day.
It is my practice to write every day.
If it is a thing, use practice. If it is an action, use practise. I find it helpful to link them to advice and advise. Most English speakers instantly know the difference:
adviceadvise you to stop.
I gave you some
The word with the -ice ending is a noun. The word ending with -ise is a verb. And you can apply that to practice and practise.
In American English, practice is the dominant spelling for the noun and the verb. However, the distinction is sometimes observed.