Fake plants only have 1 advantage - they are easier to clean. The worst part about them is that they
look fake.
Live plants will help regulate your tank and look so much better. They aren't that hard to maintain, you just have to make sure your lighting is adequate. Fertilizers may be needed, especially at first, but once they get established you shouldn't need
as much since the fish poo and uneaten food will help feed them. (You shouldnt overfeed the fish just to have some for the plants. It is my experience that there will always be a little uneaten food when it drops down into the gravel.)
A good substrate like fluorite will lessen the need for fertilizers. CO2 may or may not be needed depending on the size of your tank and the type/quantity of plants you will keep.
Lighting will be the biggest concern and cost. Each plant requires a different light level. If it doesnt get enough light it will die. I recommend you look into the types of plants you want and research their requirements. If funding is tight, look into low light plants. The more light you need, the more it will cost. Unfortunately the lights that come with most tanks are inadequate to sustain most plants.
If you are nervous about plants, I would start with low-light plants like anacharis, anubia nanas, java ferns, java moss and other plants like these. They arent very expensive (and some members will give you a really good deal or even give them to you, just pay for shipping) and are readily available.
One word of caution: Many pet stores will sell aquarium plants (usually in plastic tubes) that really arent aquarium plants. Not all plants in the tubes are bad choices, but some are. Make sure you look into the type of plant and make sure you can keep it in your tank. I purchased a beautiful plant from my lfs. A few weeks later it started dying and I then found out that it wasnt a plant that could stay under water. It would have worked planted shallowly with the blades above the water line, but not fully immersed. Just a word of warning...
Have fun!!!