not a must starting with a trainer?
You definitely won't get bored with a trainer, and it's very likely to get you more flying hours in, because it'll stay the shape it should be for longer (that is, not ground shaped!)
Put it this way.. There are quite a few people in our club who normally fly jets and giant scale models, who also have a trainer to fly for fun!
If you choose right, you can progress to the first stages of aerobatics, while enjoying the air-time you will need to get proficient.
Get a trainer first and enjoy the feeling of going home after a great day of flying with the model still in one piece!
Good luck.
David C.