If someone could look over it and let me know if i should change anything etc. I have ran some traces underneath resistors, diodes, etc to avoid going from bottom to top to bottom layer. Is that ok?
Sorry haven't had time to crack open Eagle but just looking at your PNGs, do you have any errors & warnings (tools/ERC & tools/DRC will show those)? I'm sure you must have - for example what's R14 doing - it doesn't appear on the schematic at all that I can see and appears to be in exile on the board. There's bound to be other issues too.
If you've not read it before, PCB layout tutorial
by David L Jones is a worthy read in very easy language for we hobbyist types. There are lots of trace width calculators online but he also gives some advice on that subject.
Once you've exported your board to gerbers I also recommend this standalone Gerber Viewer
. There are a few to choose from but that's in active development and is one of the few that accurately represents boards with radiused corners etc. A forum thread here
is where you can post issues, suggestions etc.
Not sure if you need mounting holes etc, but it is quite easy to radius the corners of the board (just if you like that kind of thing) and add drill holes for mounting too. I often cheat and use these Sick-of-Beige PCB templates
which have a range of sizes and have the corner mounting holes already in place (and therefore always in exactly the same place for next time too).
On the question of traces going from top to bottom and back, I don't have any bad experiences with using such vias, but others might have advice based on more science than I can offer. If vias help you shorten a path I'd have thought they were a good thing.