A 15 gallon tank will not be without challenges. But if you ask here before you do anything, no challenge is too great.
Stable water parameters are the biggest challenge for a newbie. A 15 gallon tank is small, which will mean bigger swings in water chemistry.
I run a 15 gallon that has been drilled and has a sump. Very stable water parameters because the sump adds water volume to the system, reducing fluctuations in chemistry.
Are you going to rely on hang on back filtration or will you be plumbing in a sump?
In the end, FAITHFUL 20% water changes on a weekly basis will keep your parameters stable.