Wanting a ball python, but having a bad experiences

[Sylphie]

Hi,
that's me again... I know I'm a bad person, and I'm still looking for a hognose snake and maybe a woma python...
(The good thing is that my boyfriend likes snakes too and even encourages me to get every one that I want)... but there is that nice ad on my local snake forum with 2015 ball pythons that already are feeding f/t... and I really would love to get ball python.

But like the title says I was once having a ball, he was my greatest snake, and unfortunately we weren't able to switch him to eat f/t (even after a long wait, he was starting to be on the skinny side and still wouldn't take a f/t). In the end we rehomed him to someone more experienced and I'm still sad about this. I'm afraid that I'll get a new one, and then he will do typical "ball thing" and go off food, or he will decide that he no longer wants f/t...

Are you having any tips on how to best keep them? I know there are a lot of care sheets, but I'm really afraid that I will do something wrong and the baby will stress too much and it will end in stopping eating.