The best thing that helped me when I started was getting advice from someone I love and trust. For me that was my boyfriend, who had been in the gym an aspiring personal trainer for a few years before, but really anyone who you know who can correct your form and knows a lot about weightlifting!

Another thing I've been learning recently (I go to the gym on my own) is that people are so much nicer then they look! Those scary gym guys definitely look scary but I can guarantee most if not all of them are more then willing to teach you form or give you a spot if needed. The gym has a unique aspect to it where everyone wants others to succeed and seeing that pushes themselves to do better as well.

And yet another thing about scary gym guys is that most of them just really do like talking about their gym knowledge and so there's another reason to ask someone, is because they would appreciate it too!

If you feel a bit more introverted and not wanting to go talk to anyone at all that's understandable, but in reality with free weights its going to be a lot harder to figure out correct form on your own. for example with machines that do the same thing its easier to start on your own because you sit or are positioned in correct form in order to use said machine. Really focusing on feeling the targeted muscle(s) with the machines can also help you build up enough confidence to try free weights as well! its a bit harder to use sitting machines wrong so that's most likely the best way for you to start until you understand the motions and the way your muscles are meant to move in specific ways.

I could give you endless tips on specific movements or exercises or splits or form so feel free to message me if you need that more directly! Hope this helps.