Try resting one foot on a block (experiment with books to get different heights) and see if that doesn't shift the bout of the guitar under your right arm and out of the way. That works for me.

You can buy an adjustable footrest especially made for playing the guitar. However, I use a little thing called a Backrelax (made in Canada) that a friend gave me for my birthday.

At sessions you will often see a guitarist propping one foot upon the other. This is probably not good for the foot that's taking the weight.

You can let the guitar angle away from your body. The front of the guitar doesn't have to be perpendicular to the floor.