What do you plan on doing with it? J&B is fine for mixers. But in my opinion, there's not much Scotch that's worse. It's right down there with Cutty Sark, and Glenfiddich 12. Johnnie Walker Red, Famous Grouse, Dewar's White Label and Glenlivet 12 are a small step up. But again, best for mixers. Maybe rocks.
Any of those are affordable, and will give you an idea of what Scotch tastes like. If you think you might be interested, take the next step and find some single malt. Find a good bar that has several bottles of the good stuff, and ask for a glass, neat. Tell them you want to try something smooth.
Or just try the single malt first.