it's rare to get a teacher, most us studied on our own, and asked others when we got stuck.
do you have a certain path? or do you just want to practice magick? wondering because i don [t want to suggest a Wicca book to find you your follow Druidism or something.
i'm unsure how much you know so far, so i'll assume you know nothing. magic [magick] is energy found in nature. to cast spells, one must harness this energy, focus on one single task, directing the energy to help you in life. every spells needs focus, energy, and desire. you should clear your mind, charge with energy, focus the energy on the task/spell, visualize the desired outcome, ground the remaining energy, and work to achieve your goal. for some spells like curses or luck spells you can't really do much. spells like love or wealth you can. example, you cast a wealth spell so you work harder at your job to achieve a promotion, raise or bonus.
start with meditation, it's a good idea to do daily even if you're not casting a spell because there's health benefits to meditation. while meditating, try to charge and ground energy, this is also important to spell casting. feel/visualize white light entering your body, then feel it leaving your body. there's many methods to do this, so find one that works for you. chakra work wouldn't be a bad idea either since it'll help the flow of energy in your body as well as help you in daily life. each chakra is a spiritual point in your body dealing with different aspects of ones life.
other things you should do is join a coven, they can teach you, covens are suppose to be like a second family. there's also articles, books, websites, and forums that can teach you what you need to know. good luck on your journey. blessed be.