If you're running non-stop for 30 minutes every day, you're doing really well. Took me a good long while before I could run non-stop for half an hour. Now you just need to set a goal for yourself.
You probably will not have any trouble doing a 5K, so time yourself and see how long it takes for you to finish that distance, then set a reasonable goal for yourself to reach in the next couple of months.
Say you can finish 5K in 25 mins or whatever, aim to do the same distance in 24 min in one month, maybe 23 min in two months from now. This way, you'll get your speed up. Then you can look at increasing your distance to 10K if you feel like it. Good luck and happy running!