What's your recommendation for an early money? I don't want to play with cheats since I'm trying to get feats as much as possible
First, level up your hand skill. You can do that in sexual encounter. After that, apply for a job at the spa. If you have max level hand skill (and atleast an "A" in math class), you could get at least 1k$ in a day, if not more.
If you don't want to (or want to avoid losing your virginity), join the temple as an initiates by talking to Jordan. You could get about....2k$ weekly for just existing, as long as you keep your virginity intact (you're also can get a free chastity belt from them).
Avery's money is a big help for early game (you didn't even have to fuck them, just use hand), and if you stick with them long enough, you could find some very lucrative venture (if you have enough skullduggery).
If you don't want to do any of that, you could just always move around Danube Street (better) and Domus Street, knocking the door and asking for jobs. Be ready to save, though, because not all opportunity is a good opportunity.
And of course, train your skullduggery by (in this order):
Picking school lockers
Picking closed doors in: Domus, Barb street's flat (you have to pay for each entry), and Danube.
Doing some burglary around Alex's farm, outside of the city (After you hit atleast B)
Artifact hunting is pretty lucrative, but in early game, you should avoid it unless you got good skullduggery, athletics, swimming and physique (make sure to pick large body type in character creation)