Lennington
Have been wearing the glasses every day for over a year and they're the clearest and sharpest lenses I've ever had. Don't think I'll ever go back to buying from a store.
[edit] For anyone wondering the methods I used to measure PD, I used a ruler in front of the mirror, a ruler in front of a friend and a couple of online apps like Warby Parker's https://pd.warbyparker.com/ The results were pretty consistent so went ahead with it.
I don't have any experience with Bitfountain, but Designcode.io is a great course for designers looking to get into actually building their ideas.
For the OP: Most of the frameworks out there have different advantages/disadvantages. Some are relatively easy to just dip part of a project into, while some will completely take over how you structure your project. I would continue learning JS until you really know you could benefit from a framework and why. Don't fall into the trap of looking for the 'best' framework, because there is not one.