Are you healthy and able to do sports ? Then your life isnt destined. Lifting cant backfire you, and everything productive cant backfire you in general if you search enought informations.
Search what you should eat during the day, you have to sleep at least 7,5 hours every day, go to the gym 3-4 times a week, find a proper training plan and you are ready to go, you have to patient to, you cant expect to look different in a week or a month, it will get better after 3 months.
You will need to enjoy the current moment of working out, feeling that you are close to your dream with every single repetition, thats how you gonna build the discipline to be motivated everytime.