Guitar is not a cheap hobby. Trust me! If you only have $300 to spend, you defiantly wanna buy used from someone, but you still may have to save a bit more to get something worth your money. I suggest trying to buy from a musician, personally but look up what they have before you buy it. They may want to over charge but most musicians take care of their instruments/gear. If you buy from a pawn shop then you’re pretty much just looking at the stuff that a musician felt was shit and worth the 1/5 retail price to sell or you’re looking at equipment that’s low end and that discouraged someone from actually learning how to play. You can find good deals at pawnshops sometimes but rarely.
The bundles suck. Period. They are extremely low end instruments and amps. They will frustrate you more than help you learn. Like @Fiddle_Playing_Creole_Bastard mentioned, Epiphone and Schecter are going to be you’re best brands to give you the most bang for you’re buck so to speak. They’re great for beginners and will last until you decide to upgrade, if you decide to. New, they’re going to run you around $400 just by themselves though for a decent model. Spend some time looking. I bought a 4 year old Epi Les Paul Standard identical to the one pictured for $150. It retailed for about $500 when the dude I bought it from bought it. I had to modify it a bit to get it how I wanted it but it all worked out really well. It’s my go to axe at the moment. You can find a good deal if you be patient and look.
Silvertone makes beginner guitars that are hit and miss. I’ve owned two and one was beyond great and the other was pure shit. They don’t sell the good model I had anymore but it was similar to this which would run you around $200. Buying that is risky though and could be awesome or horrible. If you try it and it’s shit, don’t say I didn’t warn you.
As far as amps go, a tube amp will give you a warmer, better toned sound but a solid state is cheaper. I have a Marshall MG 100HDFX head. I gave $600 two years ago for it and the cab. It’s 100 watts and really impressive for a solid state head but I really wish I’d have saved my money a got a tube. You won’t need anything that powerful or big unless you want to play shows but my point is this, you’re better off to save a little and buy a good tube amp (even if it’s a smaller one) than to buy a solid state because you will regret it at some point down the road if you continue to play.
Like I said, guitar is not a cheap hobby. Really, any musical hobby is pretty expensive. There are good deals out there though. Just be patient and someone will want to get rid of some gear. Be patient, look at everything you hear is for sale and be sure to do you’re homework on it before you buy it. Those are the keys to finding good deals on anything.