You know Earth Dragon the normal way in Vajrayana to approach a deity like Vajrakilaya is like this;
1. Request the empowerment, the oral transmission and explanation of the practice from your heart while presenting an offering. Repeat many times if necessary until your Guru accepts your request. Please understand that it is a major commitment on your side, you have to do many years of practice every day. It is also a big responsibility for the Guru. So don't do this if you are not very serious and dedicated.
2. Receive the empowerment, the oral transmission and explanation of the practice. This can take quite some time if there are texts that need translation and so on.
3. Do the practice and study the commentary or commentaries. Ask your Guru questions when possible to resolve doubts. Learn how to perform the various rituals as well as you can.
Eventually, if you practice very well for many years, the full meaning of Vajrkilaya and many of its rituals and teachings will arise in your own mind. At that point you can check with your Guru if your understanding and realization is correct.
"To reject practice by saying, 'it is conceptual!' is the path of fools. A tendency of the inexperienced and something to be avoided."