You seem to be a novice at cat "ownership" (you never really own a cat...) but you are concientious in taking the time to ask a good question about how best to handle a pet, so I'll pass on a bit of advice from over four decades of being owned by cats.
Indoor cats and kittens need a great deal of interaction and mental stimulation. Otherwise they can become depressed and stressed -- just like people who have unfullfilling lives.
Cats thrive in an atmosphere of love and stimulation. During their waking hours they need things to do and will look for them -- even though it may be something you don't want them to do, like jump on the counters, unroll the toilet paper and drag it around the house, etc. If you aren't at home to discourage this sort of thing, your kitty will need to have other things to keep him out of trouble .
One of the best distractors... another cat! You may want to consider getting two cats instead of just one. They will keep each other company during the day while you're away and be less likely to get depressed or destructive.
If you do decide to get two cats, make sure they are already friendly to each other -- two cats from the same litter or two cats that have been together for awhile and get along well are ideal. The best place to get two cats is from your local Humane Society or a group that specializes in cat rescue and placement. These groups are sensitive to the needs of the pets they are trying to place and they usually have cats that need to be placed in homes together as a pair. My housemates adopted a pair of cats that needed to be placed in a home together and it has worked out beautifully.
And don't limit yourself to getting only a pair of kittens. Older cats are already housetrained, sociallized, tend to be less frenetic than kittens (kittens take a LOT of attention and energy -- much more than adult cats), and adults may be easier for you to deal with considering your lifestyle. Older cats are also harder for agencies to find homes for, so you would be doing the cats a big favor -- and possibly saving them from being euthanized -- by adopting an adult.
If you'd rather just have one cat, again, I recommend adopting an adult and checking with the agency you use to see what the previous living situation for the cat was. If you can find an adult cat that has been alone before or is aggressive around other cats, you may find that will work out for your situation. This situation worked out for my brother. They adopted their cat as an adult. The cat didn't get along well with others and Toffee doesn't mind being alone all day.
And always make sure that your cats are spayed or neutered!
You sound like you will be a terrific cat parent! Good luck with your search and I know there is a cat or two out there just waiting for you!