Simple wiring jobs in the house- have a crack or get a man??

[vexed]

I usually have a go at DIY jobs but I'm not particularly practical. I'd do simple plumbing like changing a tap.
There are a few v. simple wiring jobs required about the house.
Changing a light switch to dimmer, putting up LED batten lights to replace old fittings. I've always been a bit reticent about messing the house electrics but it appears too simple to get an electrician in for! Am I being a wimp, or just prudent?

[vexed]

Thanks guys. I think I'll have a go at the basics. Some good advice. Dimmer and LEDs on different circuit but good to know for the future.