Nice thing about web developing as your target is that you can build something useful, put it on the web and use it for self-promotion. We interview developers and system designers and always ask if they've got anything online that we can check out. And it amazes me that so few people, who say they're so keen, haven't built anything.
It doesn't have to set the world alight, but something clever, well designed and professionally created will do wonders for your chances. We'd hire someone with zero commercial experience if they could demonstrate real ability and knowledge.
Your online application doesn't have to be wildly popular, it has to be well created. Make it interesting for yourself. If you're in to flying, build an online log book which shows the flights in the log book on a map. Or a flight planner which automatically shows the weather and/or NOTAMS for your route. Or a navigation simulator.
As others have pointed out, there are a million free online resources for how to do this stuff. So get to it!