The impact isn't as great as many seem to think it will be. In order to have access to the EU market you will still implement all the necessary regulation so economically despite slightly extra red tape and losing some businesses to Ireland it won't be that dramatic of a move, you'll still have visa free travel and the ability to stay for a short period in any EU country same as you have now, needing to find work after 90 days to remain there for longer.

Leaving the EU is not a dramatic shift towards more independence that some in the leave camp claim it to be, most of the laws you apply by virtue of them being made at an EU level will still have to be implemented, the only difference being you'll have no say in their construction. These laws apply to all countries who want to be in the trade bloc, Norway/Switzerland etc all abide by them right now.

The only real area where it could potentially have a big impact is in relation to immigration which a non-eu UK would have greater control over who they let in and could if they so wish remove the automatic right to live and work in the UK that EU citizens currently have via the free movement of labour regulations. At this point pretty much every other current EU member has made it clear that they will still allow workers from the UK the rights to move to and work in their countries without need for a visa. You could also deport people a lot easier and faster which I presume is a big selling point for the leave campaign, current EU regs on deportation are very limiting, time consuming and expensive. You would also have greater freedom to nationalise industry, but I don't see that happening.

So to be honest unless you work in one of the EU institutions as part of the UK's delegation I don't think it will "completely fuck up" your life, and even still there would be a need for English speaking workers so despite Ireland likely having to take up some of that work most people would probably stay on, just with an altered role.