Hi there and welcome
First, download Skype from my link below
Once downloaded and installed, open it.
If you have a Skype account already, use this when signing in, else you will need to create a new account to use it
Let me know please how you go
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.