You can definitely become a manga artist, you just need to study manga line work. Here is an example: https://media.comicbook.com/2019/07/my-hero-academia-150-152-image-pv-1178294.jpeg?auto=webp&width=696&height=395&crop=696:395,smart

From My Hero Academia, what I want you to notice is how the lines vary in thickness, where they tend to vary, and that its not perfect. That is what gives it that hand drawn charm and that extra bit of personality. Sure anime is a pretty general style, but what makes some stand out is how they express a scene with their line work, as in, how they choose to use lines and their thickness to create a different tone. Its hard to explain, im no professional, but yeah. Dont let the dream die. I wanted to do art more frequently too but I let that dream die and well... Still trying to get back on that horse. Loosen your hand and your arms, let the lines come out naturally, and study more manga reaaal up close to see perfection isnt necessary.