I loved if from the first time I went with just tarp and bivi.
However, you do have to be organised, as the fact is that a tarp gives less shelter than a tent, and therefore is colder, so make sure everything that you need is in reach as you don't want to get out again once you are settled in. Also be prepared to have to alter your tarp set-up if the weather changes, especially the wind direction.
One big positive of the tarp is that you can see out, so try to make the most of that by pitching in a way that gives you a decent view.
A 'lifter' line from the centre of the tarp makes a heck of a difference to how much room you have under it, especially since you tend to pitch the tarp between you and the wind, so it naturally blows inwards, restricting your space. Look at the difference in these two shots.
I wish you all the best in your tarp adventures.
Good luck mate.