Oh boy, Investing!

if you're starting cold I would get a serviceable guitar and then focus on making sure I had a small amplifier of good quality.or get somehing headphone friendly like a helix or whatnot. Its encouraging to sound good even when you play badly.

youdon't want to go uber budget level on the guitar but you can get a good student instrument these days for under $300... I would spend more on amplification/headphones/whatever. Helix may be over the top for you but a used line 6 PODHD comes close to their flagship and can be had very cheap and you can practice all day on headphones (not earbuds, shit will destroy your hearing) without offending anyone. If you wanna move air tubes are best but pricey for anything worth having. In solid state amps for heavy rock to metal look at orange's crush line or even better tha boss kitana line. Going cheaper than any of these suggestions will NOT be encouraging. Especially given kiss and SOAD rely heavily on their amps to do the ehavy tonal lifting, the entire style relies on cranked up marshalls or similar to deliver a muscular guitar tone. That said, amrshall doesn't make a bedroom amp that'll do what you want anymore, and eve when they did in the 80s is was expensive.