I once had a spiritual direction from a wicked nun. Ruined my spiritual life.
So I would suggest, I go by the traditional. Spiritual directors are priests
It’s safer that way.
Choose a priest who is holy and lead a good life. This is very rare in this age. I do not have spiritual director yet, but I do have 4 confessors. I don’t have spiritual directors because I do not want to be led astray by bad spiritual directors. He can tell you mortal sin is venial, and vice versa and confuse you.
For the moment I got spiritual direction through saints books.
Such as Introduction to Devout Life, by St Francis de Sales
You can get many saints books for free here
And the ones I particularly recommend here
Saints books have greatly helped my faith and bring me closer to Jesus. More than one can imagine. They lead me to the path of salvation.
The Other Books I would recommend to you is
Autobiography of St. Anthony Mary Claret
In St. Anthony Mary Claret, you can see the criteria of a good spiritual director. He is one edifying example, and very rare to find.
Diary of St. Faustina Kowalska - Divine Mercy in My Soul
You can read about how she got her spiritual director after long period of praying and waiting. You can imitate her how she obtain a spiritual director, and her obedience to her SD.
Story of a Soul - St. Therese of Lisieux
She didn’t have any spiritual directors. Only Jesus was her guide. And she made a way for little souls who doesn’t have any spiritual directors, that it is possible to attain sanctity and attain heaven, through resignation to God’s will, and do little things with great love. And trust in Jesus.
The Imitation of Christ - Thomas a Kempis
Favorite of St. Therese of Lisieux, it gives her counsels, and lead her to heaven. Favorite of many saints and my favorite too.
May the merciful Jesus bless you, and help you