Need a new phone number for social media registration.

I don't want to combine personal profiles with work profiles. For the same reason, I'm not going to delete the old ones or redo them. About the new SIM-card I thought about. But so far I want to understand what in my case would be easier and more profitable.

Thank you for the advice. I'll find out what the prices are. But it's still more expensive to pay for an extra phone number on a regular basis. And with the registration is also difficult, because there is not always time for these things. Moreover, I need a virtual number for a couple of days.