If you want to learn how to open your chakras. Its going to take time, patience and practicing you meditation. Meditation is key to opening your chakras. Meditation helps you focus on yourself, your energy and want to happen. People use meditation before spells so it helps them focus more.
There are different kinds of chakra excersizes you can try with meditation. I'll give you some links with the sources credited of course to help you learn the basics of meditaiton and chakra energy. I hopes this helps you out.