Anything you're not good at it is going to slow you down. The question is that even tho you might be slow, if you put in the effort, learn it then get good, will the savings and speed up make up for the initial slow down?
I'm a vim fan and won't try to convince others. But I personally believe that the answer is yes. One of the secret to being successful with vi is that of mindset. You need to have a positive mindset that it's worth learning, you need to commit to learning it. I learned vi when network speed was very slow and systems didn't have enough memory. It was faster than any other editor. So I had the mindset that I needed to learn it. if I was starting out today, it probably would be hard when you have editors like vscode.
I have typed and used computers everyday for 25 years non stop and I have no issue with my fingers and I believe a major part of it is using vim and my fingers not having to travel and move out to find a mouse or hitting Ctrl+ keys.