SambaPOS may take time to fully get to grips with but this is the point of Samba - that you can customise the setup to your needs. It is not a cheap plug and play solution.
You are best to spend the time to understand the system to best take advantage of the flexability.
If you want a plug and play solution with simple tick box setup then your in the wrong place and better going for a hardcoded solution where you can only do what the developer has setup and not make your own custom flows.
If your new to Samba I sujest you spend some time on basic stuff to get to grips with its automation system.
I have done several step by step video tutorials for things like fast cash and show change messages which are great learning tools as I go through the steps and try to explain whats happening.