"Is this all there is to it? everything we do/not-do contributes to our energy signature, thus attracting to ourselves the experience we/I are/am currently experiencing?"
I that all there is to what?
Does this answer anything but the most superficial of questions? Those of "spiritual" mechanics?
These are explanations... Purely technical
Is this entire life of suffering and struggle simply to attract "positive" experiences to ourselves and vibrate at a higher rate?
Any insect, reptile or crustation could fulfill these specifications and still expect to be reborn a million more times!
They also APPEAR to make "choices" of who to associate with, where to live and what to eat.
This only shows the ability to judge and desire something better, faster, brighter.
Still mired in relative and dualistic judgments and thinking. Still steeped in suffering, locked in desire and based on the assumption of the reality of a separate "me", that is different than something else.
Fear based ignorance is not banished by this. It is this.
What is it that a singularity in human form can do besides eat, sleep and reproduce, suffer, and die?
What is the greatest and deepest wish one could make whilst embodied?
What is the most fulfilling discovery possible? What "path" is truly worth walking and will never be regretted?
As Mary Oliver asks "What will you do with this one wild and precious life"?
So, i would say no, that's not "all there is" to it.
What about self knowledge, understanding?
The deep insight that gives meaning to a fragile fleeting life by going beyond descriptions and explanations.
What about going beyond life and death itself and finding out who or what you truly are?
"Swallowing the whole world in one gulp", smashing the ball of doubt, answering the question for oneself?
Deep non verbal understanding that is timeless self existent truth.
Impossible? Many have done it. Many are doing it right now.
Are you satisfied with a mechanically based system of belief?
How does that really help the thirst for meeting the truth of the vast void in front of your eyes?