hello,
is there a tutorial how to use mudfish, and i verfied my email adress and now i want to try mudfish vpn out, how it works, is there a free trial version?
When I checked your account, it seems you already have a trial credit. 
Please test with it first and let me know if its credit isn’t enough to test all features of Mudfish.
If you’re first to use Mudfish, please check our documents at https://mudfish.net/docs/ URL. And please confirm that How to check the basic functionality works fine in your environment. It’s a first thing you should test.