Find a coach or someone who knows the lifts. I was taught by a guy (Neospartan) who knows the lifts and has read but by far is not a coach. I lift more than him now. BUT, he gave me some good drills to do and helped with my form.
My experience is a bit different than some of hthe guys here who have access to coaches. At school I have no such access. I know its a weighlifting faux pas to lift without a coach, but its not the end of the world.
Of course there are issues that a coach would have noticed and fixed. My jerk sucks. My snatch only recently got a bit better. But I knew how to squat heavy and get strong and that helped a lot.
It looks like I will be able to meet with a coach over the summer! BUT, so far I have made progress without one, because I had no choice. Of course it would be better, but don't feel like you can't do anything without one.
Though it depends on your strength and size. Snatching the bar could be hard if you are a 100 lb girl or a beginning lifter but otherwise you should be able to add weight to that, even if not much. Post some videos or stats so we have an idea.