While I don't wanna get into the whole legacy vs non legacy argument one thing that I like is that most materials in this game are fairly easy to obtain. Not only that but in 1.0 there were alot of things that would become hot items on the marketplace for all levels. I can't remember off the top of my head the one item that was going for alot but people were farming lvl 10 sheep and even those lower could make money.
Also at the start the stuff that legacy players are selling and making the big money off of aren't really a concern to someone who is a lower end player as you won't be needing a Vanya robe for awhile and by then things will have settled. The market is kind of weird in this game as certain items would go from 1000k each to 100k at random times.I remember throwing items away because I had too many and then the following week people were making a ton off of it.
Lastly you would benefit from leveling classes like miner because there is always need for ores, ingots and gear. Take your time and be smart and you will do just fine and make your money. Also alot of legacy players are lazy and don't wanna farm and have lots of money exploit that.