I only started Home Brewing at the beginning of December. I have done 3 beers so far and a white wine, a Pinot Grigio 7 day kit. I agree with what everyone has said above. The instructions are over confident in the time taken to successfully make a kit brew. Double the time works. My first attempt at wine, the 7 day kit took me 14 days before it was bottled. And I will not be touching it until it has at least had 3-4 months in the bottle. And that experience worked out well I think, it looks like a perfectly fine Pinot Grigio with little or no sediment in the bottles, I hope it tastes as good as it looks.
I am drinking my first 2 beers. They turned out great, my second one was an improvement over the first, but only because of the amazing information and advice I received from this amazing forum and YouTube. My advice is to read loads from this forum and watch loads of YouTube video's. There are multiple video's on most kits, so as you can see the full process before you have a go yourself.
My 3rd beer is a Mangrove Jacks Pink Grapefruit IPA. My first time to dry hop a beer. After 10 days I added the dry hops and bottled on day 14. I transferred from the primary FV to secondary, added a priming sugar solution and bottled into 41 x 500 ml bottles. It is now almost finished its first week at secondary fermentation in the bottles. After another week I will leave it in my garage for a month to condition.
It is a steep learning curve, but the advice here is fantastic and I have learnt loads. And I have only started, there is a lot to learn yet.