I would really join this new workplace but I would like to know if
this change can ruin my reputation to future HR peoples.
"Ruin" is the wrong word here.
You will likely be asked why you left so soon after starting your new job. You'll just have to answer why, without slamming your company too much.
Something like "I learned that the actual job wasn't what I thought I heard during the interview." is a good place to start. Try to find ways to expand on that without directly calling them liars. Try to be as professional as possible.
Companies are reluctant to hire folks who they think are job-hoppers. But that conclusion doesn't usually happen after just one job.
This is my first job, I've talked to my boss about my aspirations and
my problems about this job some months ago with no result.
Do you have some advice?
Continue to work as hard as you can in your current job, while you search for your next one.
Make sure to ask more questions during your interviews so that you can find a job that's a keeper. You don't want to have two short-term jobs on your resume if you can avoid it.
You could ask to speak with a potential peer during the interview process. That's a good way to find more about the "real job" that is in store for you.
And of course use your professional network to try to get as much "inside information" about the company as possible before you interview and particularly before you accept any offer.