If this bike is your only transportation and you have limited funds to fix it don't take it off road.
Otherwise, don't worry about the bike. You might as well break things on a less expensive bike first.
Make a plan to ease into off road riding.
Start small for several weeks - easy off road riding at low to moderate speeds - and learn about how to choose your path and handle various terrain.
Work your way to moderate riding - building skill and getting to know your bike. Do moderate for several weeks.
Experiment a little with more difficult off road - ease your way into it.
Your goal should be to maximize experience and minimize risks.
Expect things to break. You will get more flats. If you hit rocks and holes you will bend wheels. Don't get too far from civilization.
Several things will happen if you take the "ease into it" approach.
- You will learn how to handle your bike
- You will build strength
- You will find out the limits of your bike and what qualities in a bike are needed to support the type of riding you like.
This information will be very valuable when you shop for your next bike. The skills you develop will help your next bike last longer because you'll know what to and what not to do.
Carels suggestion of removing the kick-stand is very good.