Hi George, welcome to the forums.
The S8 is an amazing device. It is also very complex and requires a lot more hands on managing thaniPhones. If you are not tech savvy at all, you may struggle with this device. There are myriad settings in many places and it's very easy to tie yourself in knots if you blindly push buttons you really shouldn't.
However, it's worth the effort, get someone who knows android to set it up for you, perhaps even put it in simple mode for a while. That said, I have a mate who can barely read or write and he gets around ok, with me tweaking his phone now and then..
You need to bear in mind that you have an android device. It's not an iPhone, they are different, so wanting it to be like your iPhone will end in disappointment...
There you have it.. It's your call. You have one of the best phones on the market at a good price, latest software. Be brave, make the jump, come on here with any issues and we'll help you ������