I am 58 yo computer dinosaur soon to be extinct and I feel confident to give some advice before it happens. The rules of structured and systematic programming

I am 58 yo computer dinosaur soon to be extinct and I feel confident to give some advice before it happens. The rules of structured and systematic programming are not difficult to learn and acquire. So the question for me is do you like what you are doing? If so, you could arrange with your employer to have some time out for qualification measures. Or you could do the same between jobs. It could be an online course specialized to your field or one more general. Also you could just study for yourself. For continued success in the computer field there is no other approach than 'life long learning' nobody can know everything. I am self-employed and I regularly take qualification time off where I extend and refresh my knowledge in the field. It is never a mistake to acknowledge our limitations, it is a mistake to give up something we like just because we feel we could be better. Nobody stops you to become as good and as competitive as you want. All the best!