Building an AR is not hard, but you do need to know where all the parts go. I would start by getting a good build book or two and go from there. Also, be advised, parts availability is very limited right now. A good one is AR-15 builders guide available on Amazon. I have not seen one that doesn’t give the basics for building. If you run into issues with the rifle or have questions on parts compatibility it’s probably better to reach back out to a community such as this. Good luck and let us know how it goes!