Well, the first step is to pray for God's Will. So many people these days asks God to help them because this or that without asking Him what He wants them to be. So praying for God's Will is important. It will likely be a while before your prayers are answered, but God will reveal His plans to you eventually.
And when God calls one to the religious life, trust me, you will know. God will make sure of it. You know, Mother Angelica originally couldn't have even pictured herself as a nun, yet ended up being one. She was kneeling before the Blessed Sacrament one day (it was either that or a statue of Our Lady, I can't remember which one) and it was then she realized God wanted her to be a nun. So don't worry, God will eventually let you know what His Will is.