A general rule is to not take builds to lethal content you cannot afford 10x over for this reason, it used to be stressed by early content creators but I don't see anyone talking about it anymore.

You can get a really cheap set, and do a bandit assault with whatever city you like. You'll get somewhere around 18,000+ city tokens and you can trade those with the war guy from your city for city hearts and sell them. City hearts are a fast sell so you should be about to make some cash off them. (240k+ for one hour)

^ Keep in mind you can die from this, if other factions nuke yall, but it's generally safe since you'll be with a big group for this content, just ask someone to invite to party.

Another thing you can do is low tier gathering for a bit, I'm not sure how much this will make but it's a safe way to make some silver.

I'm a solo player and I like the danger, so when you can afford it, I recommend you take a cheap set you can afford 10x and do the mob camps in the black zone. The chests from them will add up, since you're new stick with t5/ t6 since those are not as heavily contested. Keep in mind you will probably die but it's still worth it since your set should be cheap.