Bass?

I've started the beginner course with John Statham and in his lesson on finding your vocal range, he has baritone and tenor for males. I have always thought I was a bass, and when doing his scales I could not get all the way up on baritone.

So, does this mean I am a bass? And will his course still help me out?

It could mean you're a bass - or that you just haven't trained your upper register! Every beginner I've worked with thinks they can't sing past a certain point, and then quickly find out they've just found the limits of their chest voice (speaking voice) range. 

In general, here's how to approach exercises going too high (or low) for you: 

You can always drop out if an exercise gets too high or low to be sung comfortably. But before dropping out, try three things:

1. Modify the exercise to make it easier (ie: sing on a lip trill, hum or NN/NG instead of an open vowel or other syllable, if that's more doable). 

2. Sing most of the exercise, and just "think" (audiate, or sing in your head) the pitches you can't reach without straining or going sharp/flat. This gives your vocal folds an opportunity to still adjust and prepare to sing those out-of-reach pitches, even if just air comes out. 

3. Make sure you're shifting registers when necessary. For example, you may be unable to sing higher pitches because you're still in chest voice, in which case you'd need to "shift gears" and find your head voice placement.

Additionally, check out this live lesson on head voice for male singers and see if it resonates with you! https://www.youtube.com/watch?v=HZxaod6wlSo