People recommend singletapping because it allows you to play maps in a rhythmically sensible manner. for example, 1/4 streams are essentially equivalent to singletapping at 1/2 with both fingers at once. It allows you to make quick and accurate transitions between different types of notes 1/2, 1/4, 1/3, 1/6, whatever, with twice as much ease and accuracy as alternating, therefore complicated maps with a lot of transitions are MUCH easier for a singletapper than a full alternator.
You also have an easier time holding rhythm. I used to full alternate and I'd often find myself losing the rhythm and completely failing fast, hard consecutive jumps. Obviously this is a matter of practice but it will take much more practice to learn to alternate effectively like this.
your playcount is quite low you won't be losing much much to learn to singletap and you have a lot to gain, especially for playing maps with complicated beats.
Developing singletapping speed and stamina takes quite a lot more time than alternating, however, so keep your alternating close to heart when you're dealing with higher bpm 1/2. For example, by the time you're able to read Scarlet Rose [hardest map] properly, it's quite unlikely that you'll be able to singletap at such a pace.
Hope my information was relevant and useful.
waits for his hoardes of haters to point out everything he said was wrong when it wasn't
