Make time every day for meditation. Even 15 minutes a day can help if you've got a busy schedule. Learn how to enter a state of deep relaxation with ease. Once you can do that, practice simple visualization techniques.
Try looking up the Middle Pillar Exercise from the Kabbalah. Doing that exercise three times a day for two weeks can increase your energy level a lot. It helps with aura cleansing and a few other things as well. If you can't find it, just message me and I can type it up for you, I do it a few times a day myself.
I don't know if you're familiar with hermetics, but you really should be if working with a hermetics based system. Try looking up hermetic correspondences as well, familiarize yourself with them.
Energy manipulation is a must as well, learning how to build and control it, directing and transferring it as needed. I can give you a few exercises for that as well if you're interested, just message me.
Also, in order to work magick, we must first work on ourselves. Physically, and mentally.
There are many, many more things you should learn/develop before attempting rituals or spells. These are just a few things. I studied for over a year before attempting my first ritual. That's just me, everyone's different.