You can buy tester switch packs so that you can test how you like the feel of different switches. It’s probably worth the investment if you have no idea what you like. But to be honest, I’m a n00b (been active for 2 years now but at a very basic level) and I chose my first switches based on an assessment of how I’d rated different keyboards over the years. (Possibly easier if you’re older and opinionated - I’m a millennial, I have several decades experience using different home, school and office keyboards and have always had strong keyboard opinions). I knew I liked clicky keyboards and proceeded accordingly; I looked at which clicky switches were well-regarded by the community and watched YouTube reviews, and started from there.
Having said that, I recently built a keyboard with silent switches for the first time to see if I liked them too, and it turns out I do. So I guess my main thought is that building the perfect keyboard (=endgame) for you is a journey, and kind of the whole point of the hobby. The experimenting is part of the fun.
I’m in the UK so I don’t really recommend you shopping with a UK store since you’ll be hit with customs 🙄 There are good EU keyboard shops, so it’s worth just doing a search for “switch tester” and limiting your results to Europe. But if you get stuck, UK Keycaps stocks testers, as does The Keyboard Company. Worth looking on Etsy too, as there are traders on there who sell keyboard parts.