Yes and no. If you have same source and sample it to 48kHz and 96kHz, you won't hear any difference. Your dog would, as they hear much higher, but you won't. It's physics and biology. So no need to waste resources on that if on budget.

Problem is with the source. DSP filters and distortions tend to introduce "false signal elements" called aliasing that are not supposed to be there. Good plugins oversample the signal (= raise it to 96k or 192k or higher) internally, so the DSP parts prone to aliasing will generate it way higher then is your audible range, thus you don't hear it. (...and then they downsample it back.) Theoretically if you use lot of oversampled plugins, all that resampling may actually eat more resources than just switching the daw to 96k. ...but from your description, that is not the case.

I personally switched to 96k, so I don't have to solve plugin oversampling too much. It's essentially 2x oversampling the whole DAW. But be careful if you want to do this. Suprprisingly A LOT of plugins don't like sample rate changes. They either crash, or they have badly written DSP that relies on samplerate too much and they change sound when you switch. So if you're not sure that your computer can handle it, stay at 48k. Honest advice. It will save you trouble.

First:
Madeon. That guy. Out of all those really young producers I believe him the most. I love how he respects the music. All his partying and festivals are kind of a biproduct of his career, not the main selling point. (Or at least it feels like it.) Just sayin.

Second:
Tour videos are awesome. I loved Skrillex ones few years back. It really does inspire you, becouse that lifes are so surreal.

Third:
Honest but bit salty advice: Don't get too much attached to them. Inspiration gets a lot of power in hope. ...and you might end up right up there and have such a cool life too, but there's equal chance you might not. In that case, the same hope that powered that inspiration can beat a crap out of you. So just be careful.

Music theory is great and IMO you should spend some time educating yourself, but it can be a steep learning curve for some people, so don't let it discourage you from making music.  The world is full of great talent with little or no formal training.

This.

If you want to do melodic music, you'll have to learn some basics. Notes, intervals, chords, scales. ...but focus more on learning how and why are they created instead of rote learning them one by one. That's needed for live instrument playing, not so much for producing.

Timezones. Also you're essentialy describing DOS attack.

As making pretty much just instrumental stuff, I try to consider the name of the track as the only bit of lyrics it actually has ... so I probably over-complicate this, but I try to come up with word or few of them that somehow support the "message" the song has.

I actually hate it. I've heard bunch of protest songs over the years and I can honstly say that I hate how political emotions connected to the topic of the protest song overpower the actual music. It would be OK if the idea expressed in the lyrics was somehow ethernally true or inspiring in some way, but that doesn't happen very often with protest songs. It's usually a "melodyfied propaganda". ...so your actual liking of the song depends on how much you agree with the expressed opinion. Music itself gets out of the way. I hate that.

...so for example I like that "Dear Mr. President" song by Pink, but I feel like if this song was more right-wing oriented, I wouldn't like it that much. ...and that fact I ironically hate.

Not nearly as old as some of those mentioned, but Tycho didn't start making music until he was 20 or so (I think he mentioned that in an interview) and was working as a full time graphic designer.

Wow, didn't know that.