I feel like you're getting somewhere, Hayunb97, and I think that you could and should work out on a concrete goal for yourself.
Take for example, Drawabox.com, where it has lots of lessons on some drawing fundamentals. Here's a link here.
The reason why you could, would and should do it, as long as you follow along the lessons there, you'll be able to get a whole lot better well and faster, even though that they'll be a bit too duller and too boring for you, but a little bit of consistency is worth it.
Tip: I suggest you go thru lesson two, and practice with 5 minutes of 30 second studies and practices of the straight lines and more. Again, it's worth it.