I've got one now too, and I really like it :)
I know someone who lent theirs to someone and they broke it - not sure how, but it's obviously possible. They're really good because you can use them for digging, scraping, pushing and pulling soil - they're a very versatile and useful tool. Feels very ergonomic to use. I think you still need a hand held fork for levering as well - but it replaces a trowel, and it's better than a trowel.
I don't know? Is probably fine I imagine - or post a link to the original.
Watch your shins! The blade needs to be very sharp. If you can get a genuine World Ward 2 machete, they are much heavier than the ones you buy in the disposals stores. A Cane Knife is another starter but the same tips apply. Both are wicked tools more easily wielded by a young and very strong person.
Personally I would get a set of Friskars long-handled 'grass scissors' which is not their official name but it's what they are. Searching their website just now is a nightmare. It is something like this:
With an adjustable scissor-action cutting head BUT mine has two handles at right-angles to the shaft, not like this one which would be tough on the hand and wrist. A trip to the local hardware might be useful though. Sometimes they stock them, sometimes not. They need to be kept sharp, learning to use a fine file to sharpen the blades (like scissors, only on one side) will be well-rewarded.
Blimey that's a wicked tool, too.
OK on the Bunnings website is this:
which is precisely the contraption I have. The giant scissors fold out and are adjustable for angle. I can guarantee that this is the simplest and most ergonomic device around and if you can find one, go for it. It is now $145, more than double what I paid some years back - they go in and out of stock. Anyway ... you will do better with this contrivance than anything else. Buy yourself a fine file to keep the edges keen.
Hedge shears are OK if very sharp BUT you will be bending a lot. OK if you're 24-34 but not 74 ... Try them first after giving the edges a good sharpen. See how you go before spending more money. For all-round trimming up against things like pots that you would not want to whipper-snip, the thingies I have illustrated are hard to beat and are worth every penny if kept sharp.