A pic won't tell you how to source parts for and assemble a custom cassette - not the easiest task, and fairly expensive. It sounds like you may have only a single front chainring (called a "1x" system). Such a set up simplifies the bike, but there is no benefit without a cost. In this case, in order to allow both high and low gears the rear cogs have a very large range, and therefore larger jumps between gears. There is no solution other than a custom cassette to achieve smaller jumps on a 1x without changing the front. If you have a 1x the simplest solution in my view is a smaller range standard cassette and a smaller front chainring. Even then you need to decide how low and high a gear you need, and what the limitations are for size of your front chainring with your current cranks.