Even if you've ridden dirtbikes before, I cannot recommend strongly enough that you take a rider's training course.
In some states, it's required in order to get your Motorcycle Endorsement on your license. Even if it's not, it's a good idea. There is SO much to learn about riding a motorcycle, and riding a bike like this is very different in some ways than a dirtbike.
That said, how much did you pay for the bike? How long since it was last ridden? Some of the stuff (brake fluid, oil) might be due for a change right away.
Many folks on here will say: Get protective gear, get some training. I'd tend to agree. I lowsided at between 20 and 30 MPH, dusted myself off, picked up the bike, and kept riding. In street clothes, I would have been somewhere between 'in pain for days' and 'going to get my broken ankle set'. Jacket, gloves, boots with ankle protection.
In the end, welcome to the forum! We want you to stay around and read and post and chat for YEARS. We don't say to get instruction because we think you don't know anything. We say it because we ALL know there's more to learn, and we've seen people die. Stick around.
Never ride faster than you can stop