Hi @Teej
Thank you so much for joining the chat and what a great question to start off with.
You are in the same boat as I can assume many others on this forum are.
Right at the beginning of your job hunting journey and that's exciting. 
First thing I would start with is changing the way you view what is coming your way.
Instead of preparing for a huge amount of rejection as you put it, what if we tried wording it differently and saying,
"how can I prepare for the huge amount of interest in my extended gap break bwteeen jobs?
I am almost positive that you have a story in all that time however let's focus on how we can make that work for you.
In my experience working with business owners and employers I have noticed a growing trend on skills based focuses with regards to hiring staff. This means that they are not so much looking for when your last job was and are instead more interested in the skills you have that can be transferred intot the job you are applying for.
So for example let's use the example of the most common reason why some people are out of work for a period of time.. sometimes people take a break due to parenting.
This can range from 12months to 10 years for some.
In that time I quite often get a lot of parents say, "I haven't worked for x amount of years I have no skills or I've losty the skills I had".
I usually say ok let's look at what your job has been and what duties you have from parenting:
* cleaning the house and making it look presentable
* preparing shopping lists, buying food and cooking meals
* playing with children, changing nappies, picking them up from school, taking them to sports or appointments
* discipline
* It's on call work, long hours
What sort of skills would you have just from the tasks listed above:
* cleaning - visual merchandising, maintain cleanliness and sanitation of all work/play areas
*shopping lists etc- planning and preparation, budgeting, marketing based on expenses, accounts receivable, accounts payable, tracking inventory,
creating multiple meals for challenging customers in an evolving environment
preparing bnutritious meals demonstrating through instruction building life skills (following recipes)
* playing w/ children - fostering fun, creative and safe educational environment
* discipline - advanced training in alternative disoute resolution, excellent communication skills, conflict resolution
* time management
* ability to work unsupervised and make quick, crucial decisions
* not to mention being a domestic engineer (stay at home parent) is volunteer work and volunteer work always looks great on a resume!
Quite often we think there is nothing we are good at yet most parents can do these things without thinking. It is all about perception and how we see our situation so try and think of all the things you have done in that absence from working and I am positive you will find some great skills!