I would recommend a few minutes in a larger newsagents. I like the Investors Chronicle.
Other options include independent financial advisers and brokers but both have an interest in what you invest in so I would not myself call them independent.
The London Stock Exchange website has a good list of brokers. You should not use a broker who is not on that list.
Whether today is a better time to buy than tomorrow is anyone's guess but I agree that it is a good time to buy when the market is low although my personal feeling is that the market rose too quickly today and yesterday and I would be inclined to wait a little before investing in something like a larger UK companies investment trust - but that is no more than my guess.
There is no such thing as "the right investment". You should only invest in something that you understand. Different people have different attitudes to risks as well.
Before you buy anything though, you must accept that it is your money, your decision and your profit or loss that you will have to deal with. There are often people coming on these boards wondering why the £50k savings guarantee doesn't apply to equity investments. As long as you buy through a LSE broker, you are guaranteed to own the shares that you pay for but there's no guaranteed profit.