I concur with the posts above. Also, your Jeep is a capable vehicle off road in stock condition specially on mild trails. Adding lift and tires can lead to more mods in the future which you may not want. Drive it off road a few times so you can get a sense of what you need. Unless it's a Rubicon, the stock tires will be your first limitation. You can fit 32" off road tires on the stock wheels with no other modifications; spacers are required for wider tires.
That will give you significant more off road traction.
Unless you are willing to go to 35" tires which leads to a whole series of other modifications you will not get significant more benefits from going to 33s unless you are doing it for looks or you are really pushing the limits of smaller tires. All of this stuff will become more clear once you hit the dirt and gravel.