Don't center on your anxieties, Grage. Keep your focus on the here and now, where it belongs.
Decide which path you want to take and start heading down it. As a general rule, I find that low level hybrid builds are pretty bad unless you are trying to PvP.
The best stuff in talent trees tends to be about 20 points in, around the Tier 5 stuff. Shoot for that. Most people go for the highest talent, and then go down a second tree.
Slicing is good for getting cash when they are not doing anything better, since it costs nothing to send them out and companions like C2 will just sit there and rot otherwise. Biochem is very useful overall and will take you clear to 50 and beyond. I Synthweave for armor, but it is a massive credit sink.
We are a very gear dependent class. Do not neglect your armor. Get it quickly. Relics at 19, Implants at 25, Earpieces at 15. You can usually get good deals on the GTN.