Firstly, keep trying, how do you know you are not good at it.
I have been designing PCBs for 40 years, and had to teach myself.
There are a lot of tutorials on the web. You don't say what you experience and background is in electronics, some of the tutorials start at a very basic level.
https://learn.sparkfun.com/tutorials/pcb-basicshttp://www.ti.com/lit/ml/sloa089/sloa089.pdfhttp://www.build-electronic-circuits.com/pcb-design/Look at other PCBs, it helps to see how other people have done it.
That schematic does not appear to have been done in a schematic capture package which allows the schematic to generate the interconnections and pads in a layout package, is that correct?. Using a PCB design package has the advantage that if the schematic and footprints for the parts are correct, then there will be no wiring errors in the layout cycle. If you don't have a package, look at this list.
http://www.electroschematics.com/2249/pcb-design-software/Some come with footprints for a vast array of parts, this saves you having to create your own, don't assume that they are all correct!
Placing the footprints on the board is the key to a good design, you normally have connectors on the edge of the board, components that generate heat may need extra copper or heat sinks, and need to be placed away from other parts. Op amps need bypass capacitors directly on the power supply pins, and keep the tracks on the inverting and non inverting inputs of an op amp very short. Distribute power first, then critical signal paths (low noise, high speed etc.), then everything else.
Copper fill of unused trace and part area is a good idea, can give you a distributed ground on a simple board, but you need to make sure that all of the copper is connected. A good package will do a check on your layout to notify you of interconnect and clearance issues, for example.
Best I can do for you,
cheers,
Richard
