Does the amount I play per spin change the amount I win or how often I win?

The amount you pay per spin can change the amount you win but not how often you win. But it is important to understand that the amount you bet has no effect on the RNG and therefore the outcome of each spin. Higher bets have no effect on the symbols that line up, yet should you be lucky enough to spin in a combination the payout would be higher if you bet was maximum than should it be minimum. But that is as far as higher bet benefits go, so the amount you win is directly related to the amount wagered and therefore your bet does affect the amount you win.

At the same time, it is important to understand that the symbols appearing on the payline is not affected at all by the amount of your bet. Your chances remain the same whether you bet a higher or lower amount per payline. What does increase your chances of winning significantly is the number of paylines you activate or bet on as you have a better chance of winning via a combination.