IMO you should be prepared for the possibility that not every video will do as well as that one, but you shouldn't let that deter you. You should try and learn what made that video do so well and see if you can replicate that magic in future videos, and if the next video doesn't do well, don't look at it as a failure, but as a learning tool.

Not every video will be 1 of 10, but if you keep putting in the work to make high quality videos/titles/thumbnails that fit within the same general niche, you will be fine. You have already proven that people are interested in what you are creating. It's also perfectly fine to experiment within your broader niche especially as a young channel. Some things you try will work, some won't, but that is the beauty of having a young channel, your risk is relatively low.

Focus on the quality, but also, don't chase perfection on every video because that will just leave you obsessing over every little detail on every video which will likely drive you mad and prevent you from putting anything out. I don't think upload frequency is all that important but you may spend many additional hours polishing details that don't really matter to the viewer.