Like almost everyone else here, I have no real experience or education in this area but...
Have you set yourself a realistic expectation? Honestly think about this.
If you've lost 4years of learning, is it reasonable to expect that you can get back to the same place in the space of a short internship or course? No, I really don't think so. I doubt it will take 4 years either but I think you need to set yourself a reasonable expectation so as not to stress/depress/burn yourself out. Perhaps 1-2years?
What were you working on 4 years ago? Was there a side project or something at that time which you could revisit. Ease yourself into it and practice the skills you still have (i.e., your 4-years-ago self). Maybe that's a month or two. Then look at growing your skills from that position. DO NOT look at where you were just before the amnesia and try to get back to that. You might even take a different path.
Have you set yourself a realistic expectation? Honestly think about this.
If you've lost 4years of learning, is it reasonable to expect that you can get back to the same place in the space of a short internship or course? No, I really don't think so. I doubt it will take 4 years either but I think you need to set yourself a reasonable expectation so as not to stress/depress/burn yourself out. Perhaps 1-2years?
What were you working on 4 years ago? Was there a side project or something at that time which you could revisit. Ease yourself into it and practice the skills you still have (i.e., your 4-years-ago self). Maybe that's a month or two. Then look at growing your skills from that position. DO NOT look at where you were just before the amnesia and try to get back to that. You might even take a different path.