The bass itself is not the problem, I guess. The amp... well, I'm not a Line 6 fan, but it should work.
To find a tone you like, go about it systematically. Many beginners try all kinds of settings randomly.
Best is to do all of this in a pretty large room. If you can't find your tone in your bedroom, you are welcome to the club. This has to do with the physical aspects of low tones (read up on that, it helps).
For a funky effect, plucking pretty close to the bridge is a good option.
Start with neutralizing the settings on the amp.
- switch the tone shaper to 'clean'
- switch off all effects
- set all tone controls to 12 o'clock
Now start with the bass. Try out the pickups seperately en check out tone settings for each pickup. Try to find out what you like most. Write down the settings.
After you've found your bass settings, start with the amp.
- play around with the tone settings; for a funky sound, go easy on the lows; try to get a nice punch
- after you've found your tone settings, write them down
After that, you may fool around a little with the tone shaper. See what it does.
Good luck