How to remember similar characters?

i have been learning for a few months and i still mix up kana that are super similar, idk why. i just do. I use anki so should i just write it out to remember the shape or smn? what about kanji? they have super similar stuff too. how did you guys solve this? any advice would be great! cuz its so fucking infuriating how i keep mixing up my kana even after solid few months of studying japanese