Looking for young horse

I’m looking for a young horse to start and build up by myself. In best case already used to halter and trailer. Should be a mare or a gelding, in best case at least around 140cm by now or with further growth. I’m looking for a healthy future fun/trail ride/maybe even small competition prospect. No big wishes when it comes to gaits, can be a fivegaiter or a fourgaiter, optionally showing both, a bit of trot and a bit of tölt already. Looking for a horse born around 2021/2022 and ready to start the training. Located in Danmark or Germany.