Are you a recreational user or casual hobbyist?
This is an important distinction because the casual hobbyist doesn't need anywhere near the number of features that a seasoned railroader may need. Some of the best introductory DCC systems offered by names like Atlas and Digitrax will run a few locomotives, and some (literal) bells and whistles. Some are even capable of small upgrades. These “starter” or “beginner” DCC systems are affordable, easy to use, and are a great way to take a few baby steps into model railroading without breaking the bank. If you eventually decide you want to dive deeper into the hobby, there will be ample ways to expand and grow your layout.