While having outside help can be beneficial, there are many unqualified people out there so selecting the right trainer would be key. That being said, there is a plethora of free material online on how to develop skills. I would first start with exploring the free options and see how far you can get on your own before resorting to outside help. There are lots of fitness communities out there that can answer questions if you need more help.
Having a personal trainer has three benefits:
1) You will learn the proper technique to do your sport. This will help you get started faster and avoid many potential injuries.
2) Trainer will hold you accountable. If you are not that type of person who can hold herself accountable then trainer will do this for you.
3) Trainer is another expense. This can be a good motivation for you to stick to the sport. Otherwise, you would be wasting your money.
Btw, what sport do you want to start with?
@mybutler In that case, I think you should give trainer a try. At least for a week or two until you get a grasp on it. Crossfit is one of the sports where technique matters a lot and bad form can quickly lead to injury.
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