I remember when I first started Japanese at university. Our teacher started with katakana (yeah, no idea why… but luckily I never ended up having problems with as many others do), kanji and only then switched to hiragana and kanji.
He showed us some foreign words written in katakana so that we would lose the fear or the language. I remember sitting on the bus back to the dorm and fighting with tears, because I was so - angry - how little I understood… just everything looked the same and then he started with kanji immediately.
For days I was frustrated - and so was my friend. We both thought about giving up and indeed the next class, only half of the people were there. After that one, again only half of the people were there and so on. They all gave up before the breaking point… when all of a sudden it just clicks. I still hit those walls, even know, with a looot of previous kanji knowledge and a lot of grammar knowledge.
Stick with it. Suddenly it will click. And also, do not push yourself too much. I know when one is frustrated it seems that studying MORE would make more sense. My brain just shuts down then and I get nothing done.
If you are comfortable with 30 minutes a day, maybe twice, go for it. But not more. It should always be fun.
Also there is no meaning to it if you study 5 hours a day now and after a month you quit out of frustration. So study as long as it is fun to you and as long as you can concentrate. I would focus on the reviews daily, get a routine and then you’ll see the progress.