I have played .012+ on my electric. My #1 guitar now has .008s. I'm happy with this, but that's me.
My suggestion to all new guitarists is medium. On acoustic, that's about .012s and on electric, .010. (Guitar strings are usually judged by the gauge of the lightest string.)
There are people who rep for heavier gauge strings, saying they sound better and stay in tune better. That's fine, but the higher tension can tend to hurt your fingers, especially if you haven't worked out how hard to fret the notes.
There are people who rep for lighter gauge strings, saying they bend easier and don't hurt your fingertips. That's fine, but the lower tension can tend to cause you to bend when you don't intend to, making you sound out of tune, especially if you haven't worked out how hard to fret the notes.
You might end up loving bridge cables. You might like angel-hair strings. I don't know what you'll grow to love, but I say buy mediums until you can explain why you want to go higher or lower.
I'd also suggest that, as a beginner guitarist, you likely have no idea what "tone" means in terms of guitar strings. It's such a heavily-overloaded term that I don't think any two guitarists use it to mean the same thing. Could be bass/treble, brightness, sustain, signal or something else. Use mediums from a reputable brand, and stay with that type of string (not necessarily that set, they do wear out) until you can explain what you're looking for and not hearing.
Your strings have nothing to do with hum. Your pickups, your guitar's shielding, the quality of your cables, pedals and amp all have something to do with hum.
Ernie Ball Slinkys are perfectly good. There are brands some like better, and that's fine, but many of the best guitarists out there play Slinkys, and even if they're getting them free, if they didn't sound good, those guitarists would go to other brands. If you find your body chemistry makes your strings go dull quickly, try coated strings. There's only one string maker whose products I would suggest you avoid, and to be honest, they were violin strings, which are played differently than guitar strings.
To repeat and summarize: stick with .010s from a reputable brand until you know why you want to change.