On the journey, there are a lot of obstacles/roadblocks that you need to overcome. It's an inseparable part of it. 
Some time ago, I ran to one video that influenced me a lot (it was part of one paid program that I've been going through). 

It's about Hero's journey in movies or literature, but it can be easily transformed into my life as well. I found myself as the hero on a journey too. Feeling the same, especially in the stage of Crisis. 
I'm trying to be confident but many times I'm doubting myself in almost everything 

in my ABAP Academy job:

• Is my English understandable? (I'm not a native speaker),
• Do I have something to say to people? 
• Am I annoying and boring? 

... and the list can go on and on.)

I just want to say that it's normal and many guys, including me, are experiencing similar feelings. 

Making a big change is a tough challenge. 

So keep it going, my friend :) 

Best, 
Tom