While it is entirely possible to train alone, it would probably be better if you hired a bodybuilding trainer as you will get the following benefits:
You might have been think of doing the training for a long time but never really got the push to start. By having a trainer, you are forced to finally make the commitment and do it. No more dreaming. It’s time to make it a reality with the help of an experienced teacher. You will also be given a definite schedule for training which you will have to attend knowing that someone is out there waiting for you. After all, you paid for his or her services. You should make your money count.
Tell your trainer about your background and current fitness level, as well as your end goal for this project. Do you want to get lean yet muscular or massive and intimidating? There are different approaches to achieve these things. A plan will be drawn to take you where you want to go within a realistic timeframe. There will be milestones along the way to mark your progress. You will know exactly what you need to do for each session so there will be no guesswork. It is a slow but steady march towards the target.
As a beginner, you probably have a lot of questions regarding bodybuilding. You may believe certain myths that lead you to bad decisions. Ask all of your questions to the trainer and learn as much as you can. There are a lot of things that you can read from books but having someone coach you one-on-one is priceless. The advice will be tailored to your specific case and not on ideal scenarios. Their knowledge is not limited to fitness either. They probably have a lot to say about nutrition which is crucial for progress. If you ever wish to join competitions, then they can surely give you pointers.
Lastly, trainers will provide you with the motivation you need to stay with the program for the long haul. This means knowing when to push, when to pull, and when to change things up to keep it exciting. No one becomes great overnight. Your body will need lots of time to adapt to your training load. The goal might take many months or years to achieve. You will need to want it badly from the start and have the right people to keep your eyes on the prize.