This job is for an experience DIYer. I mean, If you're not use to a lot of 'little things' when it comes to tools, angles, materials, and so on, you could be asking for trouble. One of the KEYS to this job is how you START the job. If you don't do this right, the finished job will CERTAINLY look lousy.
First, I suggest you ctc. the Mfgr. of your siding for Installation Instructions AS WELL AS a copy of the Warranty. I'd READ the Warranty carefully as anything you do MAY void it! (So do read it.)
Beyond that, there are some links I can give you, but they may NOT 'correlate' to your particular case. Soooo, what I give you may only be general in nature.