When you are looking to get into a new career (or even a new profession), you are often going to find that the skills which probably served you very well in your previous profession are just not going to be enough to carry you through in your new one. The skills of one job may port to another one, and one industry may have some overlap with another industry, but in a lot of cases you are going to be starting out back at square one. So even if you are a mid-career professional who have a decade or more of experience, you are still going to be a rookie at what you start into now.
The good news about this is, you can still learn a lot more skills in life. If you want to and have the basic aptitude to do so, you can learn just about anything that you really set your mind to learning. You can grow your skills into anything that you can conceive of them being, just as you can grow your muscles, essentially in the exact same manner. When you put in a little bit of exercise, you can see a little bit of results. If you go at it like Arnold and give it everything you have got, you can do some pretty extreme things.
Of course, there is also a sort of triage that you are going to have to do when you start to learn some new skills. You do not want to be one of those scatterbrains who try to learn absolutely everything. Generally, you want to actually limit the focus of what you learn to just the parts which are going to help you to tackle your new career path. If you can get those things all straightened out and shored up, you can go very far with the new path you take.