Finding a regimen is probably the hardest thing once you become natural, because there are SO many options, techniques, and products to try. My advice is to first understand you want to BUILD a regimen. Try not to do ALL of it at once. You'll end up spending a lot of money on things that don't work.
Start with the basics. You're hair is so short now, no one will notice if it's not styled perfect. So focus on finding a shampoo, and some conditioners. Try to keep in mind what your needs are (such as dandruff, dry hair, or oily hair), and what type of look/feel your going for.
There are many different types of regimens out there. There are "cone" free regimens, sulfate free regimens, protein free regimens, and the list goes on.
Try to experiment with a few of them. I found that my hair prefers a silicone free, sulfate free regimen through testing different products and seeing how my hair reacts to adding/taking out certain ingredients. I found when I took out silicones and sulfates out of my regimen my hair was softer, shinier, and all around healthier. This is probably going to be the most difficult part of finding your regimen, but it will help you when you start experimenting with other products.
Once you found your basics products try to figure out your porosity. There are MANY articles and threads on NC.com about finding your porosity and what it mean for your hair. It's important to find out your porosity because it will give you a better idea as to what types of products your hair needs in order to stay healthy, and how they will react to your hair. There are also many different ways to correct porosity. I have very porous hair so I do Apple Cider Vinegar rinses to correct my porosity issues, this has help my hair health tremendously.
Once you've found out the basics your hair is probably going to be much longer and in need of more styling products. Finding styling products is probably the easiest part of your regimen. It's really up to you as to what you think your hair should look like. Just try to keep in mind of ingredients you know your hair likes/dislikes. If you see someone who has a similar curl pattern as you, and has a final look you like, try to find out what products/techniques they use.
Finally try to find products that are flexible to your hairs day to day needs. Have products handy for when you hair may be more dry, or more oily, or frizzy. Just be prepared for anything, because your hair is never the same everyday
PRODUCTS I USE:
Shea Moisture Moisture Rentention Shampoo (for normal days)
Neutrogena Triple Nutrition Cream Lather Shampoo (for monthly clarifying)
Garnier Triple Moisture Conditioner
Tresemme Naturals Moisture Conditioner
VO5 Conditioners (any)
Olive/Almond/Safflower Oil (to seal)
Ecco Styler Olive/Argan Oil Gel (I like hard holds)
Olive Oil/Honey/Regular Conditioner (under a plastic cap overnight)
For hair growth you're probably going to only get about 1/2 inch a month. Only genetics can significantly increase your growing speed. I learned that the hard way. Although you can take supplement to strengthen your hair and increase you chances for less breakage/more length retention. I take biotin and it's made my hair MUCH stronger with less breakage. I also take fish oil (for shine), iron, and a multi vitamin (for overall health).
Hope this long post helps you build a regimen, and good luck.