"Come, let me cause you to know them,
namely, the four principles of life…
to bind with them -
Set your heart upon god!
Adhere to the law!
Go in ma'at!"
Be small of wrath!
Be a good man!.."
"Conversations in the House of Life" ("The Demotic Book of Thoth" - 388-390)
If you feel called to Kemetic religion and wonder what should be your first step, my answer always is “Just make that step”. Come before the Netjeru to walk on the path of Ma’at and prepare a place in your heart where your honored Gods will reside, making your body and soul into their temples; guiding your boat on the waters of life.
If you have attraction to certain Netjer, by whatever reason, try talking to that one.
Even if you just consider the deity to be handsome. This also is a valid reason :)
If you are attracted to the pantheon as a whole, address them all, as one divine family… and ask if someone wants to take a larger role in your life, to “step in”.
Once you let them in (as living gods- they may reside in your heart), even if you don’t think about them often, they think of you :)
It’s not required to think about the Gods every single minute of your life, but it makes one happy when you know that deities are loving, caring, helpful and ready to hear your prayers, your praises, and the sharing of your concerns and worries with them. They are like your family and friends; think about your prayer/shrine time as about divine phone call or skype chat with a close friend who is not physically present, but always ready to answer your call and listen.
If you are drawn to several Netjeru already, then start doing more for them and learn more about them.
You do not have to have one central Netjer to work with. There is more likely to be several. In Ancient Egypt it was not common to choose only one Netjer to serve/“work with”. People had personal devotions, and may be had their favorites between Netjeru; but more common case was that there was a group, or “family” of the Netjeru who were closer to that particular person.
Frequently it was defined by the place they lived in and other circumstances. We know accounts of ancient Egyptians who had Netjeru appearing to them in dreams, and this causing their focus of devotion to significantly change. There are recorded stories of people who were called for intense devotion by Mut, Aset/Isis and Djehuty after the Netjeru making clear appearance in a dream. But most of the people simply followed their hearts, natural attraction, tradition of family and home town.
Choosing one “primary” Netjer doesn’t mean that you can’t have “many”. Historical example again: even the high priest of one temple could also have priestly ranks and offices in other temples, dedicated to other Netjeru. So, Egyptian priests could bear titles “high priest of NN, and priest of NN, and NN, and having a shift in the temple of NN”, and it totally worked.