where are the front air bag sensors located? Can I fix the problem my self?

Hello, your concern does not sound like it's related to "front air bag sensors". Sounds like the steering wheel may be locked tightly against the steering lock. Wiggle the steering wheel left and right a tiny bit while trying to turn the key. Once that turns, you'll be able to start the vehicle and also release the shift lever. That's what it sounds like from here. Contact a local shop near you for more guidance and possible inspection, if you can't resolve it easily. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops