How do you handle the thought of being late to the party?

I have been learning/using technologies like Go, Docker, etc. They all been now around almost 10 years. I feel that may be I am late to the party. How do you overcome that thought? Or in fact use that as an opportunity?

I get this idiom from investing that the best day was 20 years ago and the next best day is today. Wondering are there any good blog or books around this topic?

Thanks.