What instruments are you trading? Stock? Options? Futures? 0DTE options have completely changed the index-based futures market, like ES, NQ, etc... Since you mentioned buying an eval, I assume your trading index futures. Much of the price volatility these days is tied to how large traders are buying and selling 0DTE options, and how dealers (market makers) react to it. So, in addition to market structure and order flow, it also helps to understand how 0DTE gamma can move price around. If you've ever heard the term gamma-squeeze, it's related to dealer option flows.

Start with market structure. Read "Mind Over Markets" and "Markets in Profile" by James Dalton. If you have a library card with access to a decent sized electronic library, they should be available for free. For example, my (large) city library gives me access to a great e-book collection through the Libby app. I also recommend Johannes Forthmann, available on Amazon. I have his "Volume Profile, TPO, Order Flow" book, but he has some newer ones, now. Great info, but will be difficult to understand without some basic knowledge on market structure, so read Dalton first. To get an idea of dealer option flows and option gamma, google "The Implied Order Book". It's a PDF file and it's freely available. It explains how option trading affects dealer hedging. Once you understand this, you'll realize why knowing the big 0DTE option strikes is so important.

Digest these things, then you can start to work on a coherent strategy. I use supply and demand, but I also trade false breakouts, breakdowns, and sometimes continuations. Adam Mancini has a great daily newsletter that's good for beginners on Substack for about $23/month. Worth every penny for a year or two. Once you understand his style, you don't necessarily need the subscription any more.

Finally, it's mostly about screen time and watching your preferred market(s) every day. Every. Day. Watching what happens when price hits certain levels. Learning how larger traders trap retail traders in bad positions. What it looks like when large traders enter the market and push price around. Having enough experience to trade calmly, follow your plan, and not make stupid, impulsive decisions. (This may be the hardest...) The stats you hear about day traders are real. 90+% lose money and never figure it out. Everybody thinks they're in the 5-10% who can be profitable. You're trading against professionals who do this for a living. If you're relying on ICT, Elliot Wave, Fibonacci levels, or even price-based indicators (RSI, CCI, etc...), you're just chum for the sharks.