I need genuine guides please 🙏

I really want to start this journey, and need guides on how to start, someone also reached out to me to buy from them and it cheaper, is this possible? Or only online is possible, I want to use zavamed, can someone who has experience with zavamed kindly help me? What's there procedures, how long after purchase will I get it, are they real? You can recommend any other easy one to buy from,

Thank you