Safety is of course very important, and I know I say this at the risk of sounding cavalier, but it is a wee-bit-overblown on the internet.
If you can make sure you are using the correct components, in good condition, in published data ranges (notice I didn't say "exact"), with good QC, the chances that you blow yourself up should be extremely remote.
If .1gr of powder or .01" of seating depth is what does you in, you were too close to the line to start with. If this were not true, all bullet companies would need to publish data. So... don't be lackadazical, but just take a deep breath and relax. I sweated stuff to that degree when I first started out, learning later that it wasn't really necessary.
Advice I believe IS good for a newbie:
-Buy two manuals and read all the sections related to anything you plan to be doing.
-Start with a single stage or turret press. People say this, not everyone seems to take this advice, but I'm a reasonably intelligent guy and I'm glad I started with a turret press. The reason is simple; there is less to learn at once. When you are starting out, your goal is to learn about how ammo and the ammo-to-chamber relationship works (you'll soon be amazed at what you didn't know). Single stage and turret presses are very simple devices that you will not have to learn about; they will let you concentrate on the ammo. Progressive presses are more complicated machines... when you get a progressive, you will need to learn about the machine and all its automatic gizmos. If you start out with a progressive, you will be trying to learn about both the press and ammo at the same time and will have to diagnose a system with more variables than necessary.
-Get some LE Wilson max case gages for the calibers you intend to load. This will give you a good basic idea of whether your sizing is working out correctly or not. This is basically guesswork with no gage, and is very important.
You can learn to load with no one teaching you; I'm living proof... don't be afraid to ask dumb questions, go slow, use good QC practices, enjoy.