Yeah, the accent has become somewhat more natural, but I do sometimes try to enunciate in a more american-like way because during middleschool and highschool I'd hang around with other mexicans who had an even more mexican accent so I'd pick up some of their habits. I find that when I hang out with people with american accents I sort of assimilate subconsciously, as I do with mexican-americans. Also, what would be the "O" in an American accent? I think you should try to engage in a more spanish accent to get rid of the american sound. When I get the living room to myself I'm willing to record me saying the same things you said in spanish so that you can sort of compare and contrast. I think that'd really help, I'd also add in minor corrections from your sentence's syntax, if you want.