Advice for beginner in the gym

Hi yall, I just got one of my first gym memberships at edge and I wanna take it a little more seriously… I am looking to get rid of loose skin and a better way to take care of myself.. if anyone has good gym workouts that helped them with lose skin I would love to hear… I have never lifted weights and fear to lift them without anyone with me.. (I do have weak arm straight) which I also wanna work on too.. if u have any advice, please lmk..