Mark your cutting line and place the wood in position against the fence.
Without starting the saw, release the locking catch and bring the blade down to the wood.
Tap the timber left or right until the correct edge of the blade is lined up with your mark.
You can position a cut to a fraction of a mm this way.
Lift the blade and if you have a clamp with that saw, without moving it, clamp the wood so that it can't move.
Now, pull the blade fully toward you without pulling it down.
Pull whatever trigger there is to start the saw and let it come up to full speed.
push or pull the safety catch that lets you hinge the saw blade down, and do this in a controlled manner.
Ideally, if the wood isn't too wide, the spinning blade will come down into fresh air and the safety guard will retract as you bring the blade down. The blade will be spinning in a narrow slot in the tablenof the saw.
Keeping the blade "down", push it away from you steadily and through the wood from the near edge to the back edge against the fence. That is your cut. Push slowly and steadily without jerking. Go slow at first while you find out how easily your saw and blade cut any particular piece of hard or soft wood.
Release the trigger and let the motor come to a stop but keep the blade hinged downwards while this happens.
Finally raise the blade out of the wood. The safety guard will cover the blade and the latch will lock the blade in the up position as you let go of it.
Unclamp the wood.
Whatever you do, keep your holding hand out of the blade.
Dry run this whole process a few times first with the wood pulled to the side so you don't cut anything.
Get used to the sequence. Repeat, repeat until you have it down pat. Once you know it, it only takes seconds to do.
Some saws don't have a clamp to hold the timber and rely on you holding it.
Some people prefer to hold because it's quicker.
Just be aware that the risk is having your holding hand bitten by the blade so keep it well back from the blade at all times. If you have a clamp, use it. If you don't, then you need to squeeze the wood tightly back against the fence and down on the bed of the saw.
I'm right handed so I hold / clamp the good piece of the wood on the left of the blade and the piece to the right is generally my waste / offcut.
Don't brush anything out of the way until the blade is stopped.
Hope this helps.