If you are looking to get started on meditation, try the exercises in Franz Bardon’s Initiation into Hermetics. In there meditation is broken down into the simplest steps possible, leading to the more difficult stuff. The book is available free on the web.
EA also has a video with one of the easiest meditations ever.
Simple Meditation To inject Your Life With Magick [EAK] - Become A Living God
Also check out Lady Eva’s excellent “challenge” post on meditating for as little as three minutes a day.
Meditation can definitely help with negative self image or behaviors, along with the other advice given regarding angels.