GYM question (weightlifting). i hope im not in the wrong discussion...

As a 82kg 22 year old, i still have no clue where to start when it comes to weight lifting. My perception of weightlifting is very serious in a way if that makes any sense. In a way i feel pressure from others, as if i should know what im supposed be doing when im in the gym and the dead lift area is staring at me. so what are the most important 5-10 things i need to know about weightlifting. Appreciate it yall.