Easier gears are lower.
There are some riders that rarely change until cadence is way out of the usual range and others- like me- that seem to shift gears about twice as much as others. If you have a cadence that you like then you will find gear changes more frequent to stay around that cadence.
Sounds as though you are in a fairly flat area and if the highest gear of 48/11 is too low for you- then it is possible to get a larger chainring if you feel it is necessary. Only point to look out for is that it will fit the spacing of the crank bolts on your crank as there are several variations possible.
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How long was I in the army? Five foot seven.
Spike Milligan