To seek knowledge is as a trial. In errors, wisdom is birthed.
If you never get anything wrong, whatever you’re doing is probably too easy. Also, it’s normal to forget things. I forget English words all the time and I’ve been speaking this language daily my whole life.
I think it’s essential, too. I think beginners see how many characters they need to learn and shy away, but there’s not really a way to avoid kanji in the long run unless you’re comfortable being illiterate.
I think a lot of folks here would recommend Satori Reader because it includes definitions and explanations of grammar in the text. That would largely resolve the issue of encountering words or structures you don’t know.
I have also seen people recommend browser extensions like Yomitan, which is a dictionary you can use without leaving the page.