Não sei qual o objetivo do texto, mas fiz o que pude.Não sei se está 100% correto,mas modifiquei algumas coisas, que a meu ver, faziam mais sentido e outras que acho que ficariam melhor dessa forma. Espero que minha correção não tenha piorado o seu texto.
Things I still haven't done in my life
There are many things I haven't done so far and that I would love to do. For example, I have never traveled/travelled to the United States in my life and I think it would be very interesting for my English learning. Moreover, some American habits are very cool to me, like the garage sale, where people can buy anything /(interesting things) (for very low prices)/very cheap. Another thing that I would love to do is bungee jumping, but I have never done before, because my mother never allowed me to do so, but it is another story.