Christianity is a religion based on the life and teachings of Jesus. There are many christian groups with different opinions. Some accept Yoga and some do not. For some Christians it is a question wether they can practice Yoga or not. First of all Yog is in the west mainly a body exercise. In this way everbody can do Yoga. Yoga is good for relaxation, fitness and mental health. In Yoga each may go his own spiritual way. Christians are allowed to keep their faith in Jesus. Most important is to which spiritual Master you pray or what role model you have. If you pray to Jesus, Jesus will lead you in your Yoga exercises. There are in Yoga many different spiritual paths and concepts of God. A Yogi can be an Atheist, Christian, Buddhist or follower of other faiths.
Take things as they are. Look closely at your situation. Find flexible your spiritual path: "My personal way of spirituality is ..." Forward. Success.
As you know the Sanskrit word "yoga" is usually translated in English as yoke...a means or path to uniting with the divine. There are more than 100 forms of yoga. The three major schools are bhakti, devotion, and jnana, knowledge and karma, the way of selfless action. Raja yoga can apply to, and integrate, all three in mental and spiritual concentration.
The ways of devotion, (spiritual) knowledge and selfless service are common to the mystical traditions of many faiths, albeit using different terms and techniques. The terms “contemplation” or “meditation” may mean the reverse (discursive vs. nondiscursive) in Eastern versus Western faiths. Discursive is a process of reasoning.
Two of my favorite quotations on grace:
“God’s grace is the beginning, middle and the end. When you pray for God’s grace, you are like someone standing neck deep in water and yet crying for water.” Ramana Maharshi H
“God continually showers the fullness of his grace on every being in the universe, but we consent to receive it to a greater or lesser extent.” Simone Weil J/C