Get started now
What I suggest is to create your own libraries. It keeps symbols and footprint styles consistent and it just looks better. You can usually find all the information you need to create a component in a custom library from the datasheet.
There are many nmosfets in the standard Eagle library. For the IRL520 just use an nmosfet with the same case and change the 'Value'.
My Full Review and Experience with ALLPCB
Price or quality?
Free PCB Board by ALLPCB Sponsorship
Lead-free Solder Paste for 0402 Metric Chip Components
PCB Instant Quote