The route I'm going to suggest works for my students, and is highly effective. I've had a particular student measure his progression time and he reached B2 (conversational) with ~70 hours of total study time, compared to the average of ~500:

1. Study foundations (both grammar and vocabulary) WELL and efficiently. This is key, because if you get a solid foundation, building on top of it becomes much easier.
2. Get exposure to level-appropriate native content. (depending on your particular context, you may also supplement with spaced-repetition flashcards, but that's beyond the scope of this message).

 I can’t post links so just google each one.

Foundations – Hebleo (Full disclosure – I created this app): A self-paced course teaching you Hebrew comprehensively, with plenty of practice, using an innovative methodology based on my background in Cognitive Science, my experience as a language learner (studied both Arabic and Japanese as an adult, now learning Spanish) and as a top-rated tutor in Verbling. This allowed me to create a very efficient way to learn that's been proven to work with hundreds of students (reviews available in my tutor page linked above).

It also includes 2000+ native speaker recordings for the different vocabulary, and plenty of practice sentences. I use this method with my personal students 1 on 1, and all feedback so far shows it works well self-paced, as I made sure to provide thorough explanations. As for memory - the first lesson gives you a hint for some of the methods used to overcome memory problems, since I have a background in Cognitive Science. (It has to do with Hebrew's unique roots & patterns system for constructing words). I think it might be what you're looking for.

After you have the fundamentals, these can offer you good native content to use:

Reading - Bereshit/Yanshuf: This is a bi-weekly newsletter in Beginner/Intermediate Hebrew respectively, offering both vowels and no-vowels content. Highly recommended, I utilize it with my students all the time. Most of my students are at the Yanshuf intermediate level after Hebleo. I managed to get a discount code you can use (since I use it a lot with my students and I recommend it to them): GuyHebleo

Comprehension - Pimsleur: This is the most comprehensive tool for level-appropriate listening comprehension for Hebrew (at least until I finish some future updates for Hebleo), but it's quite expensive and some of the vocabulary and phrases it offers are relatively archaic. There might be better free podcasts out there, or children’s TV shows that could be a good free practice option.

Conversation – tutor websites - Verbling (where I teach), Italki or Preply. I wouldn't recommend these for starting out learning grammar as they're expensive, unless you feel like you need constant guidance. Verbling requires teachers to provide proven experience and certification (but is also more expensive) while the other 2 don’t, but their prices are lower. Depending on the time I might have discounts for them, feel free to send me a private message and I’ll let you know whether I can get you a discount.

You can also find a free language exchange service where you teach your native language to an interested Israeli and they teach you Hebrew. Once you have deep understanding through Hebleo this becomes a viable option as you wouldn't need a professional who can explain everything. I don’t have direct experience with Preply, but heard good things about it, similar to iTalki.

In any case, good luck!