I recommend justinguitar.com - great coverage of the basics for free, does a better job for that than any paid course I found. If you want a paid course that’s also fun, Rob Scallon’s is good - just a little slow.
Paul Davids’ course is also great but there’s little handholding.
IMO Elixirs are great, D’Addario are always good too. I like the feel of 10’s much much more than 9’s, though 9’s are a little easier to fret. YMMV; guitar strings are very cheap so I would buy a set of 10’s and and set of 9’s and see which you prefer.
Only three strings have windings on guitars so the flats vs rounds thing is much less of a distinction. You can get flats too but I don’t think you’ll care.
Oh, another thing - amp sims. You are going to want good amp sims. I recommend Amplitube 5. I also love Kuassa’s sims, especially their Orange, Fender and Marshall sims.
Amps make a huge huge difference for guitar, much more than bass.
For the Les Paul I favoured Ernie Ball 11-48 but for the Strat, NYXL 9s.
If I was stringing a tele I’d start with the NYXLs too. They just seem to suit the less bombastic playing style, have a lovely clarity about them and last an eternity.
The Blonde Baja is a Beauty! (aaah, alliterative appreciation!)
Oh yeah. Get ready to lose sympathy for complaints about bass string pain.
It sucks bad but just play through it or it will never get better. Eventually you get the callouses and stop noticing. Well, until you start doing barre chords.
NYXL’s are basically slightly better EXL’s. I use EXLs mostly myself but NYCL will lasta bit longer. But for guitar that’s like 2 months instead of 1.5.
I have Elixir 10’s on my Revstar now and love them. I’ll check which exact string later.
edit: they are Elixir NanoWeb Light 10/46. Great strings.