Hi Karen!
Amps are like fingerprints – no two are alike, and that also goes for the people using them. A good rule of thumb is to start with all the knobs at the middle position (if they’re labeled 1-10, set them on 5, for example). Not the “volume” knob – don’t hurt yourself.
Then just start playing with each knob. From left to right, turn it all the way down to 1, play for a minute, then turn it up to 10 and play for a minute more. Return it to 5, and move on to the next knob. This will familiarize you with what each knob really does, aside from its one-word description.
Then, with all of them at the 5 position again, start to play, and listen for what you don’t like. Is the bass too boomy or overbearing? Kick it down to 3 and see what happens. That’s just an example. Your bass may be fine. Keep playing and adjusting to YOUR taste.
I find that I can get to a 90% good tone on an amp within 5-15 minutes, but to get to 98-100% takes several more months of noodling and micro-adjustments.
Enjoy the journey and get to know your amp.