It depends on your level. Made horses arnt normally easy horses. But most Young horses are difficult aswell.
My friend was 14 when she got her 5 or 6 yr old TB and she’s going training, looking to move to prelim/1* next year. If you are ready for the challenge buying a “made” horse is less of a learning experience so I would recommend bringing something up as long as you are ready for the challenge
being 14 I would probably have to rate that upon experience bc I trained a small slaughterhouse pony practically all by myself when I was 10 it was the best experience but I don't know your riding hope I could help
14 years old is quite young to get a young ester as they take a lot of time while your also in full time education and also they are very dangerous green/young horses don't work with green/young riders it's not a good mix.
depends on what you know. i personally will never support "equestrians" that go out & buy made horses just so they can show high levels. that doesnt make you a good rider, it only makes you worse.
If you know what you are doing with training a cheap horse I say go for it girl! Snowman was a cheap horse but harry trained him and he was a winner! Maybe you will have some luck too