First, if you want, you can cast a circle. This ritual can be done outside or with your altar.
Outside:
Find suitable place for burning candles. Take some flowers and pour them around you like a circle. Burn the candles. You can use any kind of candles. If you can, make a camp fire. Call your gods and goddesses. Thank to them for blooming the earth. Chant:
"Spirits of Earth, come to me
with your power and fertility,
bless me and the soul in me."
"Spirits of Earth come to me
with the power of Ostara,
bless the world and souls of everyone"
"Odin
Freyja
Ostara
Demeter
Bless the Earth, and bring rebirth!"
You can change this of course. Actually it i better to write your own. That was mine, you can use it if you like
After saying this, imagine you are with the spirits of the Earth and part of the nature.
Say "blessed be" and put out fires. Take the flowers and put them onto your altar during Ostara.
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Inside:
You can do the same things but you need to put flowers on your altar and burn incense. (I have forest incense and its very suitable)
Thats all ! I hope it helps you
Blessed Be )O(