loud squealing noise coming from the clutch

Likely either the throwout bearing, the pilot bearing or possibly the input shaft bearings. Those are the only parts that clutch pressure would really move.

Should I park it? Is it drivable? Or change parts before drive it again?

Ideally you would want to get it checked and repaired ASAP. As for should you drive it? I cannot answer that, it all depends on which parts are bad. If you have another vehicle available you could park it until you can get it repaired. Basically you will be facing a clutch replacement if it is the throwout or pilot bearing. If it is in the transmission itself a used unit would probably be a better price than repairing yours as internal parts can get expensive.

This will give you an idea of the job.
https://www.2carpros.com/articles/how-to-replace-a-clutch

Different feller

If it is not turning (like it should when the pedal is depressed) it may be locked up. the squealing you hear would be the throwout bearing sliding/ grinding against the pressure plate release (probably a diaphragm type system).

This puppy should spin freely against the diaphragm, anything else would be damaging to the system.

That screaming/ squealing is a call for help before things really get messed up leaving you stranded/ in an unsafe traffic situation/ pawning all of your stuff.

Right now your pocket book might could tolerate "just" a new throwout bearing.

Further damage may result in your pocketbook screaming/ squealing!

Do not do like my sister, ignore it all until the wheels fall off!

Be safe/ take care of your vehicle, it will take care of you!

The Medic