Changing the server location of my wordpress website

Hi,

I have a domain currently running on a hosting server. Now I need to change server of my domain.

I need to take the back up of my website so that when my domain moves from the current server to new server, I can upload the back up files.

Please guide me how to do this. Any reference to tutorial will be helpful. I know that there are lot of materials when I search but still I don’t have much confidence. I am looking for a reliable solution.

Please help me.I am new to wordpress.

Thank you for reading my issue.