welcome to boat ownership.
#1 water time. You can read all the articles, posts, how too, etc. Unless you learn how to apply these tips and tricks it really doesnt matter.
I dont mean that in a errogant or hateful way I mean it in a constructive way. Water time, application, and attention to detail is the best learning tool.
#2 Boat control, need to learn how to position the boat to effectively fish an area without compromising the area.
#3 start with what you know. If your a good texas rig fisherman start there. Then broaden horizens as you build confidence.
As for the lake,
I hate fishing standing timber. I'd find laying timber, weeds, creek channels, or rock. My last resort would be standing deep water timber. If the timber isnt that deep 3-10ft throw a t rig or jig around the stump areas. Or try a jerkbait, crank, or trap if the fish are a bit more aggressive.