That tripod is well worth a look...........it is a decent compromise between stability and cost, especially when you consider that it is something that you would not be using everyday.......so no need to buy the top flight jobs, match your budget to your usage. Also, it is light enough to be carried around and as long as you are not trying to use it on extreme terrain it should do fine......you can add extra stability by hanging something heavyish (a six pack ?
or camera bag or a plastic back full of stones etc) on that hook at the bottom of the centre column
Will have a look at the alternatives within your budget and see what there is.
The prime rule in buying a tripod ( at least the aluminium ones, carbon fibre is a different story) is that it should be at least as heavy as the heaviest load you intend to put on it...........so get the Sony and the heaviest lens you have and weigh, that will give you a good guide.
If you go to have a look at that or other tripods in Jessops or wherever, take that camera/lens combo with you if possible and try it for size.........make sure there is no wobble when the camera is loaded and.......important........with you longest lens on board and extended to it's fullest, make sure that the tripod is stonge enough to support it without the camera/lens combo drooping and you lens slowly rotating until it is pointing at the ground.
Also make sure that you can get your eye to the eyepiece without getting yourself snagged up on the pan and tilt control arms which on some can protrude a fair bit ( there is nothing to stop you have these arms point to the side or front if it keeps them out your face and as long as they don't appear in the pic.)
Night landscape is generally the same as day in terms of composition etc.
There is a temptation at night to crank up the ISO rating to it's highest in order to allow shorter shutter speeds, but that can lead to very bad digital noise.....better to leave the setting at its lowest and allow for a longer shutter speed.
At night, leave the flash off.
Once your camera is on tripod, composition settled, exposure settings agreed on, it's time to fire the shutter...........and that is when you can get camera wobble and blurry pics......and on a longish exposure time that is going to get worse so the idea is to reduce that as much as possible, which is why a lot of folks fire the shutter by means of a cable release which allows you to do the firing without actually touching the camera ( and it is shaky hands that causes most blurry pics). Now, I suspect that you do not have such a gizmo but there is a way to do a hands free shooting........and its free and built into the camera....
............the self timer function.!
You can set the camera using that to allow a few seconds delay between pressing the shutter button and the shutter actually firing....a few seconds in which the vibration caused by your hands will die off. So, set self timer...press button...hands off and stand back...camera fires when nice and steady.
For night pics one of the best accessories to have is a little torch....makes the fiddling around changing lenses etc much easier.