well, there is no need for a tutorial in XAMPP because XAMPP is just a compilation of well known webserver software.
The only thing you really need to know about XAMPP is how to start it, where your files have to be saved, how to request your saved files and where the log files are.
Most of this (if not everything) can be find at this two pages:
Everything else is a matter of learning html, css, php, sql, js and maybe more. There are very good tutorials for this on the internet.
If you have a specific question, feel free to ask it here. We try our best to help you where we can.