It's perfect, brother!! Every strain grows differently, at this point in growth you don't even need to fertilize, you can wait at least another week before starting with light doses, then it also depends on how fertilized the soil is. In any case, if you've already grown autoflowering strains, you know they start growing noticeably after the third week. Anyway, if you really want to speed it up, raise the temperature a bit (don't exceed 29/30 C) and add mycorrhizae.