If you bought it from Apple and have had it for less than 14 days, you can return it.
Without knowing exactly what it is you're trying to replicate, it's hard to make suggestions. I'm going to take a flyer and guess that you don't like the fact that Apple isn't really interested in steps as a health metric. If counting steps is important to you (and you can't go back to the FitBit), you'll need to take a look at some of the third-party apps available. I've used StepsApp. It used to be a one-time purchase but I've heard it has go to a subscription model. It has a very nice, clean interface. It also provides complications you can put on the face of your watch to track your steps. There are lots of others. Have you explored the App Store for Watch apps.
The Health app on your phone is the central hub for all of your health data. Apple Watches capture a lot more than just exercise.
So, give people some details and they may well be able to guide you.
You might also want to read through the User Guide. There may be things you don't know about that would be helpful.
Apple Watch User Guide - Apple Support