Hi, welcome to the forums. Sounds like a great idea.
Quote: "I am not very good at coding."
Well, you could go though some
tutorials
Quote: "I cant just download tons of 3d model files because I have dial up."
You could download a free modeller such as anim8or and have a go at making your own models.
And when you are ready to show off all of the work you have put into your game you could make a thread about it on the
WIP Board (read the rules before you do).
Good luck with your game
A clever person solves a problem, a wise person avoids it - Albert Einstein