How to safely withdraw from CC's?

[NinjaInPygamеs]

Hi, as a noob to this - I've recently acquired a CC which seems to be legit as I tried to input it in an app without buying anything.
Now my question is: How to safely withdraw the money? Are there any recommended ways and some no-go ways etc?
I've given it a thought to just directly try to buy BTC but it feels risky to just input the CC on my phone etc.