How to get you first users while having free product

so basically we've built a product, and now are gathering some users to get some feedback, but the thing is how do we go with this, if we go publicly and just talk about it, we will have issues in our servers as we still just in the beginning and the version of the product is just an mvp, what your thoughts guys And give me your stories, sure it would help, and may be inspired by one of you. Thanks