This is why when you are learning - which is the rest of your life, btw - you want to try to get involved in projects with a small team of developers, and do yo

This is why when you are learning - which is the rest of your life, btw - you want to try to get involved in projects with a small team of developers, and do your best to do things outside of your current scope. There is not much time to learn outside of work, and learning from studying is not the same as learning from real production projects. Learn by working with people with other strengths, helping each other. As for your direct question - yes, there is nothing at all wrong with turning down something if you are sure you understand the skills required, and that you genuinely are not experienced enough. Good idea, actually.