From a development standpoint web (IMO) is still predominately dominated by javascript and various JS frameworks, e.g. react/vue/angular etc. If you are proficient with javascript, learn react as there are lots of opportunities for react devs that I see. I personally prefer vue, but as a percentage of my dev time I only spend a little on front end. Vue is a growing community and more opportunities are coming up for it all the time. And Vue, IMO, is easier to pick up and become proficient at quickly than react, but from what I see in applicants and postings react still has more open opportunities.
Web backends (API's etc) are still done the same way we were doing them years ago, again, frameworks have updated but nothing that if you were capable 5 years ago that you couldn't do again with a little practice.
Basically, if you were capable prior, it won't take the average person but a few months to be pretty solid, give or take based on your prior level of competency.
