Oh, hey. I used Minna no Nihongo to learn and I use Minna no Nihongo to teach.
It’s the book my school used, but I never had a problem with it.
We also didn’t have translations, except from the vocabulary and some grammar at the end, so everything was in Japanese, but with a teacher it doesn’t matter that much. For self-studying you’d probably benefit from it unless you just look up the grammar and vocab elsewhere.
It’s a pretty straight-forward book.
Sentence patterns, example sentences, a conversation (story), some practice with the topics that were introduced by the previous sections, a lot of simple exercises, then some shorter conversation exercises, some audio exercises, and more simple exercises to finish it off. Rinse and repeat for each lesson.
The vocabulary is a little dated, I don’t know if it’s been updated, but it’s not really a problem, as things haven’t changed that much.
I haven’t used Genki other than giving it a quick look over, but iirc it goes a bit more on the conversation path, while MnN is a lot more focused on repetition and comprehension.
I feel that even without a teacher, MnN wouldn’t be so hard, especially because most sentences are pretty simple, there’s a lot of images and examples, and the vocab is also relatively simple, and can always be looked up easily, especially if you just find a list of it online.
It’s a lot like a textbook, and doing homework, so maybe if that’s not your type of thing, something else could be good. But then you’d probably be looking into more dynamic learning rather than a textbook. Or maybe something like learning Japanese with manga (it’s a book, but I don’t know the exact name).
Do you have any specific questions?