>>1269050>>1269050>long>light>easy to sharpenThat would mean one of those cheap stamped machetes. They don't keep an edge at all though (which is why they're easy to sharpen - the steel is just that soft) and are terrible to use since the lacking weight means you have to use much more force.
>i need a machete for going through thorns and stuff.If you're speaking of thorned vines (like blackberries), you'll need either a heavy machete or a billhook. light machetes don't cut vines properly and are more useful for twigs and stems. well, at least mine. though I usually keep them razorsharp, I can't get it to cut even a single blackberry vine unless i hold the vine tight. On the other hand, it's a great tool for felling trees up until arm's thickness.
Reading through what you wrote, I can't shake the feeling that you've never handled a machete or similiar tool. because of that, I'd recommend you get a standard machete with a slightly heavier blade and a good (non-stainless and hardened) steel, for example the cold steel latin (though those ship blunt, so you'd need somebody to put the first edge on it).
A light machete most likely isn't going to work properly for you, and while it is nice to have a machete that's easy to sharpen, that makes the blade more vulnerable to chipping and bending.
And obviously, you should stay away from extremely top-heavy or double-edged ones, since those take more skill to use safely.