When I started learning, I bought a cheap ukulele that looked nice at first but the sound was really weak, the strings sat far from the neck and I ended up getting discouraged. Then I realized that for just a bit more money I could get one that sounded way better and lasted much longer. The big difference is in the sound and wood quality - a decent beginner ukulele doesn't need to be expensive, but it's worth avoiding the absolute cheapest ones.
For value for money, Kala is a brand that shows up really well online and has entry-level models between €80 and €150 that are pretty reliable. There's also Donner and Mahalo that are more affordable. But here's the thing - what's your maximum budget in mind? And do you prefer a brighter sound (soprano) or something a bit deeper (concert)? Because for someone at home who wants to try it out, a soprano is enough, but if your fingers are bigger a concert will be more comfortable.
The most important thing is to play it before you buy, if you can. A music shop will let you test it, and you can tell right away if it sounds good or not. It's not worth saving five euros on an instrument that you'll just end up keeping in a drawer because it doesn't motivate you.