Iit depends if you have we good content or notThe answer to the question you asked can vary greatly, some channels reach it within their first month if they're lucky... others can take 1 - 2 years... it all depends on your content, how good it is, how many people are in your target audience, how active you are, how you promote your videos etc...
Keep going you will see good resultshello I started my channel about 2 weeks ago and I got in the first week 35 sub. I have posted only 2 videos, now I posted 4 more videos and I'm stuck on the same amount