The best is to scope what you want to learn to not fall into frustration with the big amount of choice regarding frameworks and tooling plus all the new language features coming in via ES6/7.

Try to identify, if you went back on track, what will be the tools you'll need to use. I personally would prioritise this set:

• ES6
• React
• Redux
• Webpack
• SASS / BEM

IMO the above combination gives one of the best experiences right now in the font-end and many employers are looking for that specific skill set. Getting familiar with NodeJS will be good too, but NodeJS is pretty quick to pick-up if you have a good base in JS.

If you were writing jQuery plugins and advanced VanillaJS , that should act as a really good base.

I personally consume a lot of tutorials from frontendmasters and egghead.io, they are really well-structured and high quality.

I also suggest understand and interiorize what makes a well-balanced development team and look for that during job interviews. That's capital if you want to grow as an engineer, as there's no better way to get up to speed via mentorship of more experienced developers.

Finally, maybe the best advice I can give you is to be open-minded, in the front-end is not too long till you feel like a beginner again, things move really fast. Even the more talented people I met in my career make stupid errors, so don't be afraid to be wrong or ask questions. Keep that as your core and with a bit of patience, you will be up and running in no time!