Need help installing sliding glass door

I think I bit off a bit more than I can chew with replacing an old sliding glass door in my house. Looking for someone who can maybe help me finish the project.

I've already removed the old door and all of its associated apparatus. I have the new door already, but need some help or guidance from someone with experience to finish installing the new one.

Would appreciate any and all help, and would be more than happy to compensate. Thanks in advance.