I would recommend a beginner to read clever books on the subject of winning in gambling. If you do not understand anything and do not know how, then the chance to win you will tend to zero.
In any case, success comes only with the availability of knowledge.
How do you even consider a realistic strategy to win in slots? If dice is a game of luck, at least it gives you almost half a chance of winning. Slots are the randomest of random luck games. You simply don't have any control over the machines you're playing at. I've played a number of times in slots just to waste extra tokens and i choose which to sit on by how attractive the machine is.