As you are a new bee to PCB design, the Job work you done is Good, but with much smaller corrections it would be look like it was done a professiona designer.
In this design you have not considered the
1.Tear drops while bringing the tracks from PADS,Tear drop will give strength to tracks when components are desoldered, and
2.you have not utilised the space effectively, means some area you left as unused, tracking density is not equal.
To become a profesional designer you should practise all these.