How do I get better at handling inventory discrepancies and counts?

You can run the inventory day to day now, which is real progress. What still trips you are the discrepancies and the counts, the moments where the numbers fight you. That is the harder half of the job, and struggling with it does not erase how far you have come. Discrepancies feel overwhelming when you treat each one as a fresh puzzle with no pattern. But they are not random. The same handful of causes are behind most of them: miscounts, unlogged returns, stock in two places, receiving errors, theft. Once you know the usual suspects, a discrepancy stops being a mystery and becomes a short list to check. Start keeping a simple log of every discrepancy and what turned out to be behind it. After a few weeks, patterns will jump out, and you will know where to look first. The counts get easier the same way, through a steady method you trust rather than speed. What trips you now is mostly the unfamiliar. Make it familiar, and it steadies.