Please don't be embarrassed by the weight you put up. I use to be like that too but the guys there do not care what your putting up. Besides the only way it'll get better it by doing it and increasing your weight regardless of what others think about it. We allstarted low at some point.

Also pictures in a book/online can be decieving if you can ask someone that would no the proper form and ask them if they would mind showing you or have them watch you and see if they can find out if infact you're doing something wrong