There are several things to consider when looking at tripods..
Rigidity, the more solid the better!
Weight/size, the less the better
You are young, likely studying math in school, you could plot curves for the above parameters, they will cross at some point..
The most rigid tripod will not enhance your images if it is so bulky and heavy you leave it at home.
The lightest most portable tripod is similarly useless if it is like mounting you camera on a block of jelly.
You are the only one that can choose that crossing point.
The next question is apart from low light and very few other situations what AvPhoto needs do you have that require a tripod?
Having burned out more than a few shutters over many 1000's of images I have rarely required a tripod(apart from supporting the camera between shoots)
If your camera sends text messages, that could explain why your photos are rubbish!