If you 're not tech-savvy, with solvers etc on your screen, forget about winning online, even at stakes as low as 2/5c. At these stakes, crafty young people from poor countries make a living.
Consider online play as a training fee.
As someone who started online before transitioning to live after building a small bankroll, I disagree somewhat with this. The average 25NL online game is probably tougher than the average 2/5 live game, but both are very beatable and the skills that make you winning in one will not necessarily transfer.
In addition to the tips given above re: learning math, bankroll and mental game, I'll tell you what my general approach was that helped me move up through the low stakes online.
Generally, coming from live play, online players will put you in a lot of situations that you may never, or very rarely, see happen live. It is very natural and normal during play at any stakes online to find yourself in an uncomfortable spot and feel like you have no idea what to do. The best investment you can make starting out online is to get a hand tracking software that has a HUD. When you get put in a tough spot, or even a close spot where you're not totally sure what to do, tag the hand for review. That doesn't just mean big pots, maybe you're facing a big check raise on a flop that is good for your range - in most live games, you can kind of just chuckle to yourself and fold most hands since people aren't really attacking that spot as aggressively as they should. That won't be the case online, so you need to know how to defend vs aggression. A single raise pot where you bet small on flop then fold might not feel like it's worth reviewing because it's just a few BB but edges are tiny and playing these common spots wrong can easily hemorrhage money and make you a losing player.
When reviewing hands, try to mentally bucket different hands together. It's very unlikely that you'll see the exact same hand and the exact same action against the exact same player on the exact same board. It is very likely that you will face a check raise on a double broadway two flush flop after cbetting as the preflop raiser. If you can study generally (1) what hand class prefers to bet vs check (2) for what size and (3) how to defend/3bet vs check raise, understand why each hand chooses that action, and come up with a heuristic for how to play a consistent strategy in similar spots in the future, you will start to develop a system that you can fall back on. As you shore up your weaknesses, you can begin to notice other players' tendencies (via HUD stats or showdown hands), and adjust accordingly.
I'm not sure too many poker content creators really fit this niche specifically; I don't know that you can become a winning player online by just watching someone - it requires active learning and engagement with spots that you personally struggle with. That said, there are a decent number of "solver nerd" style youtubers who analyze high stakes hands using solvers, which can give some insight into how to think about the game. Uri peleg comes to mind. Someone like carrot corner focuses more on low stakes exploits, and how to think about the game as a low stakes player, but doesn't put in significant volume or focus on solver analysis too much.
It's a very long and (potentially) expensive journey, but it's different for everyone and there's no one size fits all "watch these videos and crush 25nl" solution. That said, it's also very helpful to share hand histories with other players, discuss strategies in specific spots, and learn from other people. Sometimes you have blind spots that others can pick up on more easily than you can yourself, but again, it requires active participation on your part. I also have a piosolver license and love talking about the game, so if you ever want to run some sims or discuss some spots just let me know.
edit - or you can just keep playing live because it's easier and you'll probably win more money
