Please don't give up. It sounds like you have started some blocks that are beyond your current skill level. Start with some easy blocks (like no triangles).
I deliberately pick block patterns that I feel confident that I will be successful. That's the fun for me, anyway. If a project becomes frustrating, it becomes a UFO.
I have such admiration for some of the quilters on the board who post pictures of incredibly difficult designs. I admire them and think, "maybe some day, I can do things like that..." There are so many things to learn to become a quilter, we are all learning.....but please don't give up......
A beginning quilt class is a good start to go over all of the basics. Even if you've been quilting for awhile, you'll pick up tips. One of our favorite teachers in my area has been quilting since she was 13 (she now has grandchildren) and the things she knows and is so willing to share..
And once again, please don't give up---