If you pick something like a doctor, you will have to deal with many years of school which can be mentally exhausting. Then you will have to deal with long shifts which is physically tiring and people who could be dying which is more emotional fortitude.
If you pick something like an electrician and you run your own business, you will have to deal with manual labor sometimes which requires strength, you will have to hire people to work for you which requires patience in being a good boss.
It really all depends on what you pick, and you can strengthen your skills from there.
My struggles are usually with "Stupidity" and getting along with coworkers.
Stupidity, as to what we are doing and why we are doing it. Example:
I was a police officer at the airport. After a terrorist attack in Scotland, we had to "step up" our security. This meant that we now had to stand in front of the terminals and write down the license plate numbers of all vehicles that drove up. We had specific instructions NOT to inspect any cars. What was the purpose of this? I honestly still have no idea. A lot of what we did was about "visibility," and making the public "Feel" safe so they kept flying.
At another job, I was supposed to help people find jobs. But, the employer was more interested in generating statistics. So, they preferred that I give a client a lot of job referrals, rather than have me spend time with the client in developing a good resume or practicing interview skills.
I got frustrated with these sorts of things. As to getting along with coworkers, as a police officer it was pretty easy, except for one guy who tried to always get someone else to handle his calls. Everyone else worked well together. But, in the workforce office, it was very different. It was almost all women, whereas the PD had been mostly men. The women I worked with tended to gossip a lot, and got offended if they perceived you had slighted them in some way. I didn't fit in. I just wanted to do my job and not get distracted by drama.
Another issue was "Change" for the sake of change. I don't mind change if it will improve how we operate, but, when they start changing things up just because they can, because they are the boss, I don't like it (Esp when things are running smoothly already!). And then, when they try to justify it with some bogus excuse ("we have had a lot of customer complaints"), rather than just saying, "hey, I'm the boss,- that's just the way it is" I really don't like that!
There will also almost always be some part of your job that you don't like doing, but, that's okay, as long as you like the rest of your job! Hope this helps!
If I have a really busy period at work, like end of month then time management can be an issue.
Best tips are to write a to do list every morning, and check off each one as you go! By the end of the day you'll easily be able to see what's still left to do so you can prioritise it for the next day
For example, one major struggle at my job is customer service; if you do not deliver the best service where guests want to return, then your job was not complete. But there's always the situation of having to deal with too many customers at once and not remembering to do certain tasks and then all of a sudden it's completely gone and the guest is upset.
Always keep a notepad for important notes.