It takes quite a lot of practice! I also find myself mistaking certain characters during my first 2 or so months of learning Japanese, but over time as I learned more vocabulary, grammar and stuff, I stopped making those mistakes. Perhaps if you stop focusing too much on writing the characters, you'll be able to improve your writing skills without even noticing?
 "Kana Warrior / かなウォリアー"){kind=icon}
It takes quite a lot of practice! I also find myself mistaking certain characters during my first 2 or so months of learning Japanese, but over time as I learned more vocabulary, grammar and stuff, I stopped making those mistakes. Perhaps if you stop focusing too much on writing the characters, you'll be able to improve your writing skills without even noticing?