It's set songs. So I'll be able to study it. But he has me doing different notes without as much movement since I'm a beginner. That's part of my confusion. If I look up those songs online it's totally different than what he's teaching me. I believe he is teaching me in steps
Most likely he is, and that's a good thing. I don't know how much you already know about music, so hopefully this isn't too simple for you, but to guide you a bit if it helps: if you're looking songs up online, I'm guessing you mean you're looking at TAB, which shows which fret to use on which string. I'm not anti-TAB, it's just a way that people communicate how they play a song, but they are not the only way to play a song and often they're not accurate anyway. So don't worry about that too much.
What you want to focus on is learning the chord progression of the song - that's what the guitarist is playing. A simple three-chord song might go G - C - D or something and back to repeat. To start with on bass, it's enough to play the "root notes" of those chords. So when the guitarists play the G chord, you play the G note (third fret on your E string), when they play the C chord, you play C (third fret on your A string), etc. I think you said you have a drummer, so listen to the kick drum and match the rhythm of your playing to that. If the guitarist is playing the G chord and the kick drum is going "bom, ba-dum-dum," then you play "bom, ba-dum-dum" on the G note.
Once you're comfortable doing that, you want to start learning scales and how chords get built out of scales. You can look up lots of scales online or in books, and drill them at home. The most important are major and minor. Each has a pretty simple pattern that you just repeat from different starting points on the fretboard.
For instance, the G major scale goes G - A - B - C - D - E - F# - G. Learn the notes on your fretboard and how to find each of those notes.
A chord is normally built from the first, third, and fifth notes of the scale. So the G major chord is G - B - D. That's what your guitarist is strumming. To get beyond just playing root notes, you built a bass line out of the notes of the chord. For instance, you might go GGGG - D - B - D - B GGGG or something. Now you have a bass line going. When the guitarist changes chords, your bass line moves to match. So if he goes to a C chord, the chord tones are C - E - G, so you might play CCCC - G - E - G - E - CCCC, or whatever. Play around with different ideas and find ones that sound good to you.
Hopefully that's helpful. If not, disregard. Keep playing, keep learning, and have fun!