If you aren't experienced doing it, I would suggest for the first time you seek out a mechanic. Here's why:
It's not that difficult PER SE to remove, but you've got a real potential to BREAK one or more of the mounting bolts if you are inexperienced at removing them. And, there isn't much room to work, so if you don't have a good assortment of socket wrenches and extensions, then you will get frustrated real fast.
A pro can remove on in about an hour.
This might be a good time to add a header exhaust since they cost less than an OEM exhaust manifold. You'll also have to remove your Fuel injection system because they share the same manifold gasket.
Hope this helps. Good Luck