Yeah, I feel you, I was stuck on this same issue when I first started diving into Vue. One thing that got me was trying to use the old v-if directive instead of v-show, was a major performance killer. Now I always default to v-show unless I really need the if.
"Yea, I remember when I was learning Vue, I kept messing up with template interpolation and lifecycle hooks. Make sure to read the official doc and take notes, it'll save you a ton of time in the long run. Also, don't be afraid to dig into the source code, it's super helpful for understanding the underlying mechanics."