I am also left handed, as is my younger son. I use a steno type notepad at work and even with the spiral at the top, it is still annoying. I turn it upside down so the spiral is at the bottom and use it that way.
I also use fine tip pens as I find medium pens don't dry very fast and smudge too easily as to the roller ball ones or whatever they call them.
Thing is, a lefty will find in life that there are tonnes of things that are designed for right handed people (most likely since righties make up the majority of the population) from knives and kitchen ware, hair supplies (barrets with danglies hanging of them) to working in a store with a cash register. Right handed people don't notice these things because they work for them. Honestly, even though you want things to be easy for your child and I can see doing small things to help but as others have said, your child will make it without special supplies.
So, if it is small and easy, I would go ahead and do it but unless your child is one of the few who are VERY left handed and has trouble doing anything right handed, they will manage fine. It's the small things that make life easier and your child will figure many of them out as we all have, like pens that dry faster before they smudge and turning note books over so the spiral isn't in the way. I write with my paper almost sideways so I don't end up with that hooked arm thing going on. It is way easier. I used to make my checkmarks the "normal" way until I was a teen and I figured out it was easier to make it "backwards" go figure! LOL AS time goes on, it will mean trial and error finding things that work better, like carrot peelers but it all works out.
Give your child a big hug and remind him/her (I can't remember which) that lefties are the only people who are in the right mind!!!