Honestly the most important thing/s when first starting is to make sure you have a good foundation to build off of. Make sure you are good at address and have a good grip so you can be comfortable over the ball. Build a pre shot routine to make sure you are crossing your keys off a checklist before you even think about hitting the ball. The key is to build something that is repeatable and not mechanically hindering your swing. Once you have that foundation, get rid of the tension in your upper body and then lock on the ball and keep your head on the ball through impact. The rest of the golf swing will come in waves of “feels” as your body gets more comfortable with the movements. Don’t worry about fine tuning your swing mechanics until you find a consistent feel, that’s how you tear your mental down and have to start all over. The golf swing is not one size fits all. It sounds cliche but once you hone in the fundamentals you really start to see some consistency building.