<human>: Can you provide a brief rundown of the text in within 3 sentences?

Hello! I'm a 18 y/o male, 6'3", roughly 380 lbs. I graduated from high school almost a month ago and I'm scared of how my weight will affect me in the future and I'm tired of being the "Big guy" in my friend group. I want to start losing but  I have no clue where to start, it's hard for me to control what I eat at the moment (still living at home and the family is not down for the getting healthy) so as of now I'm thinking just eating smaller portions and we have a treadmill I'm going to start using (I'm thinking a mile a day). Soon I'll be getting  a gym membership so I can go and start lifting but I have no idea where to start to change my lifestyle so I'm just looking for as much information as I can get (how to set up a workout plan for lifting, portion size and stuff like that). I will be very grateful for any help y'all can give.
<bot>: How do I set up weight lifting schedule, figure out better portions for food, and any other helpful tips to help me get started.