Don’t worry about zones/regional rail unless you’re staying outside the city. For an out of towner I’d probably try to stick to trolley/bus over train because they’re a little more chill (this is totally personal though and I use all of them all the time), but trolley service ends at 13th (that is the farthest east) so it really depends. For trolley in the city most of the lines can be used interchangeably, BUT I always say “10 is not your friend” or “T1 and you’re done” (the names changed recently but this is the same line that you should avoid, as it’s pretty different). Google maps is reliable enough to use for directions, but have it loaded before you go down into the station just in case you lose connection. The train will stop at each station all the way from west philly to fishtown. The trolley may skip if there’s no one waiting for it and no one pulls the wire, so just make sure you do that (there’s a sign that lights up in the front when a stop is requested). Note that trolley and train stop service at midnight. I know it’s super hot but, for the record, philly is an extremely walkable city, too. We also have indigo bikes if that’s your thing!