Before you even start driving, there is an essential step to take care of : make sure your sitting position is appropriate and comfortable.
The first thing is to check your pedals are securely mounted, or if that is not an option for you, that they are at least resting against something rigid that will stop your pedals assembly from moving away from you as you use them, or rotating over an axis. Unsecure pedals means the effort you exert is not properly transfered and will lead to inconsistent outputs.
When that is done, slide your seat until you can fully press the brake or clutch pedal by only extending your leg and not your foot. This will ensure you are capable of using maximum force with less fatigue, especially for loadcell users.
The second thing is to try and set the distance between your steering wheel and yourself so that your wrist can reach the top of the wheel with your shoulder still touching the seat. This should result in your arms forming an angle between 90° and 100° in resting position (9h15 for round wheel users).
You also want your overall position to allow you to perform all actions with a wide range of movement without hitting your knees or elbows on the rig itself or any other obstacle, and not feeling too crumpled in general.
Remember, comfort is essential to learn and build up muscle memory more easily and react fast (especially to incidents), no matter if you're using a fully fledged cockpit or a wheel clamped to a desk. It is also a key factor to stay consistent during endurance races.
See you on the race track !🚦🏁
The Race Clutch Center Team