New to me bike with some issues

[Water Warrior 2]

There are more adjustments you can make if needed. You can raise or lower the rear brake pedal to suit your foot comfort and ease of operation. Be sure to check that the rear brake light works after the adjustment too.

You can also adjust the shifter height for your foot. There is a linkage/rod that is adjustable down by your left foot. While you are at it you can give a shot of lube under the rubber booties of the linkage. Chain lube works nicely and you know you will have some available.