Jan, I live in Cardiff. I am not the World's greatest astronomer by a very big stick, but I am willing to help you if wish.
I'm in Splott, but don't let that put you off

Two of my scopes are easily travel-able.
If you look at a star through a 'scope you will only see a pin prick.
Looking at Jupiter will show you what your scope can do and jupiter is easy to find. Go outside about 8PM or a later and look towards the south. Brightest thing in the sky, just left of, and slightly above the moon.
Make sure that you have your finder set up. Do this in daylight using a local landmark, or at night using either the moon or a street light. Find your "target" in the scope and centre it in you view. Then adjust your finder so the red dot is bang on this object... it's easier to do this on a land based object as these will not move

You will probably need to re-adjust your finder each time you remove it from the scope. You soon get the hang of it.
Once you have the finder set up, find Jupiter in the finder and then it should be in view through the scope. Use the highest number eyepiece first and then go to smaller numbers. You will need to re-focus when you change the eyepiece.
I always found the GoTo alignment of a Meade problematic... I never could get my old Meade ETX-70 to do a star tour. This was probably due to operator error. Those who know better seem to really enjoy the GoTo
If you want a hand, let me know. I could pop up and meet you or we could meet at a open dark spot, park or hill.
Cardiff astronomical society are great. I was a member for a while, but could never get to the meets. They have an observing site next to a golf course on Caerphilly mountain and hold their meetings at the uni in Cardiff.
I once came last in an astronomy competition.
I was awarded a constellation prize
Skywatcher Explorer 200 HEQ5
Skywatcher Skymax 127 SupaTrak
Celestron C4-R CG-4 mount