Early on in game you could buy one of the water purification machine plans from The Whitesprings,set up camp near a pond or river and sell the water.
At level 21 your in no rush, level 50 is weapons cap but tbh at level 50 your character is still very much a noob, it's around 450 all legendary perk cards will be maxed (after a bit of trial and error).
To level quickly put everything in to intelligence! Oh and it's double xp next weekend so don't try killing enemy at events just tag them and let the others do the work.
Always join a casual team.
Thanks for the tips! I built a few water purifiers and have been collecting purified water steadily. I also found a good way to earn a few extra caps by selling the junk that gives resources I have more than enough of. I'm trying to leave about 100 lbs open in my inventory for junk items.
When I first started out, I was going for a melee build (but I quickly switched to a shotgun build after I heard they're some of the best weapons in the game early on), so I was mostly putting my points into Strength. But I think my intelligence might be 5-6. I know I've put several points into it. I'll try to max it out asap.
I also got Fallout 1st, mainly for the extra atoms, the scrap box and survival tent. It's a little expensive, but I figure I'd probably spend that much anyway on atoms alone, so it's worth it to me.
I was thinking (once I'm super far into the game and have a ton of stuff to sell) of starting a 'dollar tree' of sorts where I sell everything from the most expensive stuff to the ammo, all for 1 cap. Just to help out new players and anyone looking for what I might sell. It was just an idea I had, but I'm nowhere near ready to get into doing that until I'm able to sustain my own character.