Do yourself a favor, don't choose a blade because it looks cool and stay away from junk knives and cheap folders will only get you hurt.
There's been a lot of good recommendations in a variety of configurations and price ranges. If you are able to own a fixed blade, that would be my recommendation as well.
I have (4) relatively inexpensive knives that I would recommend in a one knife situation. In order of my preference, they are the Frost Mora Swedish Army Knife, the Mora 2000, the Becker C/U-7 and the USAF Pilots Survival Knife. I listed the first three according to price. Those being 10.00, 30.00 and 50.00. The Becker can do some chopping, where the two Moras require a batan, which is not a bad thing, just a little more work in my opinion. However, the two Mora knives are much better in ease of handling for the smaller wood working jobs. The USAF PSK is a good beat it up knife that doesn't really do anything as well as the other three, but I still like the knife and have one stuffed into a ruck. If you are shopping price, you can't beat a Mora and would definitely be the choice to make.
If you opt for a folder and decide to go with a Swiss Army Knife, do yourself a favor and don't go with the cheap knockoffs. They will fail and when they do, they will hurt you. Instead, go with the Wenger or Victorinox blades. They come in a variety of tool assortments and prices. From what I've seen online, you can pick up one with an assortment of tools, including a large blade and saw for less than 30.00. I would suggest the saw option if you go with one. It will make the knife much more versatile in the bush.
There are probably some here that would disagree with this recommendation, but I also like the German military issue folding utility knife. It has the two basic tools that you'd use in the outdoors. Those being a large blade and a good saw. They can be purchased for under 10.00 in issue condition and about 20.00 unissued. I've carried one for a couple of years now and it has worked out well for me.
Check the knife laws in your neck of the woods and see what it allows someone your age to carry. If not a problem to own and carry, be safe and a responsible outdoorsman.