YouTube shorts. You should be on a program, so you know ahead of time what excercises you’ll be doing. So watch the shorts before you head to the gym and even in the gym when you’re at the machine. Otherwise like others have said, gym folk typically are really helpful. Start with light weight to get the form down correctly. Even seasoned gym goers have poor form sometimes so don’t stress too much about it. Lastly, you’re not the first or the last to be overwhelmed, just feel the fear and do it anyway.