Get a good book. Asking for advice is all very well but if you really are a novice you need to read as much as you can.
There are no short cuts to a good garden. Make a start and build on that.
Alan Titchmarsh has some good gardening books for novices.
How Many Books Do You Have 'on the go?'
Hacking up thick phlegm every morning





and the other just grass! I can ask further along though.