Dry fire practice. Using an empty rifle in a room that has no live ammo in it. Practice shouldering and cycling your rifle. Do it 20 times twice a day and let us know what you think in about a week.
Trust me, muscle memory is a great thing. Once you've done the repetition 3000 times, you will never forget it and it might actually feel more natural than right handed. This is how I learned to draw a pistol right or left handed. Pick up/put down a shotgun or rifle right or left etc. Drawing a pistol lefty was always about 1/10 second slower than my right. This was for Cowboy Action competitions.
If some is good and more is better, then too much is just right.
My mind is a raging torrent, flooded with rivulets of thought, cascading into a waterfall of creative alternatives