Hi Youkito1991,
Nice work!. Thank you for sharing your design and make the PCB available for anyone who wish to use it.
Your description is nice and also the support of pictures is very useful.
Regards, William
Circuitmaker included one of the most friendly spice simulators, and I still find it more useful and easier to configure and use than the simulation packages in the high end "professional" packages.
Good luck, there are lot of packages at various price points to choose from.