That sounds really great! Especially the 2 hole double bend and the three hole is good too. You can move onto the next lesson and just make sure to keep practicing your bends to improve them as you move through the course. In other good news, you only need the 2 double bend and 3 semi-tone bend for the blues scale. So you are up and running there! 🙂
As for the 3 hole my guess is that you might be just a little too tense in your bending, meaning you are running out of room to move with the three hole. Try really relaxing and playing softer, that should help. It also might help to have a visual aid like this: https://soplometro.escueladearmonicaba.com/ Click the mic button and It will display the notes you are playing.
There are many apps out there that you can download that do the same thing too.
I recommend one called Blue Harmonica. 🙂