Journey mode lets you replicate items. You have to research them first. Usually you'll need 100 of them to unlock the ability to replicate (like 100 ore). You can even replicate coins and be rich! This means you only have to mine a obtain a certain amount of materials before you can replicate it for free. This helps other people get access to those same resources, so that they can replicate, too. You can also replicate accessories, which usually only takes one to research. So check out the spawn area for chests and if you need something take it, research it, replicate 2 of them, and put one back in the box for someone else. Sharing is caring! I think this will be extremely helpful, especially in Hard Mode an the ores are more rare. To open the "power menu" click on the rabbit head wearing a yellow hard hat in the lower left hand corner below your open inventory).

You can get more info about Journey mode from Chippy's video at https://youtu.be/M01jQ2XRqfE or the Journey Mode guide at https://forums.terraria.org/index.php?threads/with-great-power-comes-great-accessibility-introducing-terrarias-new-journey-mode.88233/

Be sure to check the chests at the starting point for all kinds of goodies! Take as many of an item you need to research it, replicate it for you, and replicate it again to put back in the chest for someone else. We love duping!

Chippy has a good 1.4 tips video: https://youtu.be/SBYGN9TDvUw

I'm not sure, but I do recommend looking at the wiki (https://terraria.gamepedia.com/Terraria_Wiki) for anything and everything you want to know about in the game. I use it every time I play. You could also look at a couple of YouTube channels, namely ChippyGaming (https://www.youtube.com/channel/UCdImtrRS4UewEbPdnF8R4qw) and Re-Logic (https://www.youtube.com/channel/UCq3QzpKNapKhCl4jpgQB44w).

Yeah, that's about it, but it's a 2D side-scroller with bosses and a lot more things. There's a gradual path of progression. You may want to start with wooden armor, if you haven't found any metal yet. Keep looking around for ore, mine it, smelt it, make better weapons, armor, tools, and repeat. The wiki has a page showing off all the game's armor (https://terraria.gamepedia.com/Armor). I usually go for higher defense, but there are different ways to play, not just melee, so get what you want or what you can until you can get what you want. Eventually the Eye of Cthulu will find you and attack you, so prepare to fight it off. Eventually you'll find items that allow you to summon it, so you can kick its ass. You can also look in the jungle for the Queen Bee. Your world will be "corrupted" w/ crimson or corruption and you'll need to fight the associated boss as well. If you want in the dungeon, you'll have to fight another boss (ask the guy at the entrance at night). Eventually, make your way to hell (the bottom of the map) and be get prepared to fight the Wall of Flesh and turn your world into "hard mode." That's pretty much it. You can find different NPCs that have various utilities (https://terraria.gamepedia.com/NPCs). For instance, you can talk to the angler and go fishing. There are also a variety of accessories, some of which can be combined by the Tinkerer's Workshop (https://terraria.gamepedia.com/Tinkerer%27s_Workshop). Ultimately, you want to make your way to crafting a PDA that has very many features.