Deductions & credits

I currently prn in healthcare setting as well and I’m very interested in becoming an llc but do not know the steps to take to do so. I currently work for 6-7 different facilities and manage my own schedule, car, gas, phone, scrubs for different work places ,  etc and now allowed to claim any of these deductions on my taxes. What would be the best option for me to be able to claim these deductions since I am considered self employed?