Welcome from south of the border.
Great action on your part joining the uke fraternity.
Depending upon how much you wish to spend and the type of uke you would like there are plenty of options.
There are three common sizes in Soprano, Concert and Tenor and I prefer the tenor size but what is best for you dependent upon your preferences.
As a starter uke for a very reasonable price then a Kala KA would be my choice of uke and indeed after I bought a uke kit that was of poor build quality I went for a brand that has a well proven reputation for consistent build quality and hence I bought a Kala and I am well pleased with it. The Kala KA range has the starter model then others with different wood finishes and many include the option of a built in piezo electric pickup and preamp.
Consider also ukes by Cordoba, Goldtone, Snail and Epiphone who make a neat looking concert sized Les Paul lookalike uke which is a reasonable price and has inbuilt pickup, I tried one at Reidy’s shop in Blackburn and liked it.
Ukes also come in three basic types of build, laminate, solid wood, solid bodied electric. With laminates being those of lower cost.
I suggest that you buy from a Music Store who are uke specialists, there are Duke of Uke in London, Southern Ukes in Bournemouth, World of Ukes in Carlisle, other stores may have a good selection of ukes amongst their other instrument stores such as Scayles in Edinburgh and Kennys in Glasgow and Dundee have what seems a good range. I live in Preston and The Music Cellar here has a great selection and can sell any make.
Do factor in for a case and here I would strongly suggest that you only buy a solid case and not a soft case since it will give better protection. Additionally you will need an electronic tune, I have one made by Fender which is a few pounds more but of better quality than many others, a spare set of strings.
There are free resources on the main UU website and also on ukehunt dot com where there is a free get you started pdf book for download.
Finally do check out locally where you live and you may find that a Uke Group exists, they will welcome a new member and help out in your learning.
Goid luck.