I went into my first 135 job blind too. Literally called on a Monday, "interviewed" with the boss for 45 minutes, and started on Tuesday. I self studied, and had the required ground/flight instruction. Two weeks later off I went as PIC in a C310.

I had been out of that game for almost 7 years, and just got back in this January. A lot came back to me, but it's the Ops Specs that are the individual component to everyone's certificate. That's where opinions on the internet wont matter, because unless they are with the same company, they are potentially giving you wrong information.

Good luck, fly safe, fly smart.