Certain styles of magic just dont vibe with me, and are not effective for me at all, but I watch others use them well. This is because of resonance and passion. You have to find what resonates with you and what you have passion for.
Trying to do a practice everyday which bores you is horrible. It sucks, and will make you hate magic. But, if you find what brings you excitement and joy, it no longer feels like work. You make sacrifices to be successful. You try new things, and you keep trying.
Sounds like Astral Projection would be a good place for you to focus. Actually - you could develop the rest of your practice of off that skill if you want to. Some people obsess with learning every skill, but the people who just focus on one or two skills really get just as far if not further. For example: with Astral projection, you could meet a spirit, and ask them for their blessing for your next test. They could perform healing on you, teach you about stuff, help you study, or slightly shift things in your favor. You could also use AP for healing others, divination, learning from spirits, getting advice, performing rituals ect......
And - AP will in time most likely lead you to other practices that resonate with you. Maybe this is just time to focus on that skill and follow your own path.