I'm very excited, anxious, and scared to fail at my new job. I need some wisdom.

I haven't slept much or had quality sleep ever since I received the job offer for what might be my retirement plan.

I applied to it thinking that my lack of experience would disqualify me at the resume filtering phase but I was called in for a panel interview. I was nothing but honest to them for my opening statement about my qualifications.

I self-studied for about a year to earn my CCNA and have no experience in Enterprise Network at all. My only network experience is patching meeting rooms to the IDF closet when they need a VLAN in place. I used to install dummy networks for small offices and have a lot of tech support experience under my belt.

That is pretty much a summary of my opening. They smiled and said not to sell myself short. Long story short I made it past all the interviews despite me not knowing much about the rest of the job description. I asked my new manager if there are any books I should buy some specific books and he said they'll teach me everything but will be a steep learning curb. I am ready but I am terrified to not be smart enough to learn at their pace.

I need some wisdom to better prepare.