My 5 cents are always Bookmap's Community / TomB's TraderLab, if you want to understand the money flow. It won't neccessary teach you execution, but more how to align with the markets. Hope it's useful. In terms of software, plenty of OrderFlow software packages - at the moment can't even say one has an edge above another. Depends what you want to see.
For me is follow the L2 liquidity, see those orders come in (like actually execute) at the price points, watch how the price reacts.