Invest in your own clippers. I recommend the American ANDIS clippers because they have precision teeth, so you can fade your edges for a cleaner look.
You may need to buy more than one type of clipper, for extra precision. The standard clipper will keep your length at the level you want. But you need a clipper with smaller ‘teeth’ to catch stray tiny hairs.
Invest in a superior shampoo and conditioning treatment; it is preferable if you have a treatment customized for your hair by a professional who knows your hair and scalp characteristics. You cannot successfully manage the health of your hair if you don’t know your hair type.
Do not ignore the hair’s needs. There is always the temptation to use ordinary bath soap to wash our natural low-cut because we want to pour water on our heads every day and we think there is no chemical in the hair anyway. But if you imagine the effort and products that go on our skin, it should only be logical that natural low-cut still needs to be groomed to look ‘clean’.
Experiment with colour but not the permanent or semi-permanent types. If you use any of those, then you would have added peroxide or ammonia to your hair. You will need to start a round of specialized treatments to counter the effects of chemical application.
Try simple rinses, especially any colour product that specifically says it contains no ammonia or peroxide. Even after applying the rinse, you need to continue deep-conditioning the hair so it does not lose vibrancy, as the colour rinses out whenever you shampoo. This is the safest colour for both natural and straightened hair because it causes no harm. The disadvantage with temporary colour is the restrictive range of colours available.
You need to visit your Barber about twice a month to maintain your look. Do remember that if you colour your hair, your new growth will also need to be ‘re-touched’. Every time you use your clippers, remember to match the colour of the new growth.