How to update my laptop into SSD

April 26,2020
I am using HP laptop has a 1 TB hard drive, I3 Processor, with 4 GB ram but my system is slow.
I have my own business cloud packers for more details - https://www.cloudpackers.com
But due to this system slow, I am unable to do things properly.
Recently I had come across a video where if we use SSD drive my laptop will be fast.
My laptop model is hp EliteBook 840, is this laptop compact with SSD.
Let me know and how can I install the SSD?

Thanks