Hello Nickee and welcome.Do you know what version of Mac OSX you currently have?
You will need to restart the computer and hold down the Command+R keys so it boots into Recovery
I found a video here showing you how to do it, it's quite simple:https://youtu.be/PZ2ZvwGQG_M?t=14
If you want written steps you can print out, click here:https://support.apple.com/en-us/HT204904Then scroll down to where it says "If you're reinstalling for other reasons" and follow those instructions.Does this help?
It looks like I will now be working with you. Let me go through the history and get caught up.
Please let me know when you ready to be assisted.