I remember the feeling - pootling around scrabbling bits of income together to buy a bigger ship.
Options. There are always options and it really depends on what you enjoy and want to do long term.
Mining: slow steady income. Time consuming. Reasonably peaceful in a “watch the rocks zen” sort of way. I mine to relax rather than income.
Mission running. At the Level 1, level 2 point it’s not a huge earner. Loot and salvage wrecks for a bit more income. Trade off your LP for additional income.
It starts to work for you when you are doing higher (3&4) missions. You can team up with others to run more difficult missions as a new player.
Exploration. Can be profitable. Especially if you are willing to take a risk. High risk, potentially good profit. But remember to pay attention - hunters will also like the contents of your cargo hold (and your scalp). Wormholes often have good loot, but it’s dangerous in there. Pay attention and learn how to scan and watch d-scan as well. Don’t push your luck too hard. That nice shiny is only worth ISK if you can get it to the market.
Trade: profitable if you know what’s what, but can require some capital to start.
Manufacturing: profitable, but again knowledge of what is worthwhile. T1 manufacturing can make you some income - it’s where I started - the real money is in the more complex stuff.
Some of the PvE activities are steady earners - Abyssal runs - a modest T1 cruiser can do the Tier 1 Abysses - and you can make 3-4m ISK from one run.
There are groups that run the more complex content, killing FOBs and so forth.
Emerging Conduits will require you to joing a fleet and sharing the (quite reasonable) loot and rewards.
A bit of piracy…
Ratting - killing NPCs for their bounties.
Join a corporation. They can often help either with support for ships or by helping with ISK earning activities. Don’t join just for the income, join for the friendship. Friends help.