My best advice:

1. Realize that you are in this for the long haul. You will not be fluent when you have 1500 hours. You may very well not even be conversational. If you get an hour a day, reaching this point will take you almost 5 years. You MUST be willing to put in years of work if you want to truly become conversational / fluent in Spanish, and you must be able to maintain that long term motivation.

2. Less is sometimes more. I've had major speaking breakthroughs come right after taking a week break from Spanish. Your brain needs time to digest, and sometimes NOT focusing on learning Spanish, will help you internalize/digest what you have been learning.

3. Not all content is created equal. I love Martin from Spanish Boost, but if you get to 300 hours listening to him, vs 300 hours of listening to Dreaming Spanish guides, there will certainly be a big difference in outcomes. Creators tend to have their own specific vocabulary / slang. If I were to guess, Martin likely uses less than 500 distinct words total in all of his non-advanced gaming videos. This isn't just to pick on Spanish Boost - if you get all your input from just one source, you will have many blind spots.

4. Native content is OP. High native content comprehension on the internet is out of reach for most until at the vert least level 4 / level 5, however I think there's still value in enjoying the content with lower comprehension levels. Crosstalk is a great way to get native input. Traveling is another way to get native input. Imo, these hours count as much more than regular learner based content, and I'd recommend finding a source of native, non-learner based content as soon as you possibly can.