Software tweeking

Hi out there
I have recently purchased a 3 axis cnc for stone engraving. It works well but the axis parameters and other issues need addressing to get it to work correctly such as homing of the xyz axis etc. i do know how to use the cnc but I am a little apprehensive about setting it up.
Does anyone in the UK provide this service (or have the knowledge) to do this without me having to remorgage my house. Any pointers would be greatly appreciated.

I am based in Berkshire.

Thanks for reading