My First Dealing account sounds like a book for under 5's ....
I took some great advice from the excellent UK-based blog monevator.com (which I evaluated myself and in no way hold the writer responsible for the results ;-) ) and will be staching from next month into the Vanguard LifeStrategy fund
http://monevator.com/vanguard-lifestrategy/. It's an older post, but the comments are current and it's still a reasonable choice for a beginner I think.
I chose Interactive Investor because I can share the platform fees with my DH, they are all set up for the new era of brokering (i.e. up front charges and no funny-business in the background) and their regular investment fees are just £1.50 per trade. Got the second half of my ISA allowance and will be shoving in equal amounts til the end of the tax year from my oversized emergency fund. I now know slightly more about investment than I did 2 months ago, but I am am far from well-educated just yet. From what I can work out, if you want to make a start on (very) passive investing, you can do a lot worse than start here.
And starting is kind of the point. This is the very first time I have invested apart from my pension contributions. And I never really felt very connected to those because I always thought understanding pensions and the stock market was a bit beyond me (it was the 15-million pages of gumfph they give you to read and sign that did it). And actually it isn't. Our portfolios will develop along with our knowledge. The most important thing is to start.
I must admit my brain is having a meltdown at the thought of investing £1,400 in one go every month for the next 4. But I know it's the right thing to do and I can change the amount any time I like. I can afford to lose that money, and I don't need it for 10-15 years. By which time I hope it, and its friends, will be providing us enough income to provide our basic needs. So bring it on.