This is a decent welder that will be good as a beginner and also do more later: https://www.machinemart.co.uk/shop/product/details/151te-turbo-mig-welder I have the model above that requires a 25a plug but I run it through a 13-25a adapter. It's ok so long as I don't run it at full power in which case I have to plug it in in the garage to it's dedicated socket.
That's the one I bought (151TE) from machine mart. I'm slowly teaching myself to weld. Google Mig welding forums, read as much as you can, watch as many of the youtube tutorials as you can. The only thing I've made so far is a full stainless exhaust for my 110 but I plan on doing more. Look out for a machine mart VAT free voucher and buy yourself a few spare tips at the same time. Also the mask that comes with it is pretty basic. I bought an auto dimming full face mask and it makes a huge difference! Having 2 hands on the torch and not having to take your eyes off the weld is essential when starting.