Junior Developers in small companies: what are you biggest challenges?

Hi, my name is Daniyar. I've switched my career from sales to Web Development just 8 months ago. So far it's been good, but since I work in a smaller company, I had to tech myself a lot without extensive mentorship or on-boarding process. If you are in the same situation, what challenges to you have working your first software developer job in a small company, and how do you deal with them?