I've been developing since 1968. For the first 30 or so years, the consensus was that business applications should be built in a high level language such as COBOL or even a specialized report writing tool whose name escapes me at the moment. If you found you needed some intensive calculating, you called a FORTRAN subroutine. If you needed to twiddle bits for some reason you would call sub written in assembler language. That gave you the best of all worlds. That optimized development so that most of the app was built with a high level language. You would never write a compiler with COBOL although you could (and companies did just that when they ported COBOL to the PC) and you would never write an OS or a channel program with COBOL. COBOL was certainly a targeted tool but that's the point with the best tools. What they do, they do very well. They just don't do everything. That is what I like best about Access. There is no tool on the market that is faster/cheaper/easier to use as a tool to build a data-centric application but you would never use Access to build the next great version of Paint. My cell phone is a phone, a camera, a flashlight and a dozen other things but it does none of them well. My old flip phone was a much better phone than my smart phone is.
Somewhere along the way, the inmates took over the asylum and the view changed to always using the "best" language and forget how much extra work you had to do or how long it took to develop with the most detail level language available rather than a targetted language. COBOL became unfashionable and development shifted to "C" varieties. Yes you can do anything you could possibly want with this low level language but why? Anyway by that time, I had already discovered Access and thought I had died and gone to heaven. I could create batch apps or interactive apps and even connect to DB2 on the mainframe to hold my data. I never looked back. To me, web apps are not "up", they are "down" as far as functionality and difficulty of creating something usable goes. Web pages are certainly prettier than the CICS and IMS DC apps I was building in the 70's - 90's but they are very similar in concept.
If there is a non-proprietary language that is tuned to building web apps, that is what I would use if I wanted to create web apps. Spending a lot of time learning a proprietary tool could end up as a dead end if that tool goes out of favor.
You really need to decide where you want to go with this. If you want to take a new career path, do some research into want ads in the area where you work. You should probably concentrate on learning what companies are buying rather than the "cool" tools people will recommend.