if your in america you can fight before the age of 18, we have many amature events to to with just boxing if you want that to be your base art. such events are smokers and golden gloves.
you ask is what you have going on a good start, i say yes because most people just sit there and wish, while you are taking action.
i belive instead of starting in your house, go to the gym and learn how to throw a proper punch instead of throwing a sad ass punch thinking you know what you are doing.
"every second your not training, he is..... and he is doing it, just to kick your ass"