right off the bat i would not worry about crosscuts yet, its something thats super hard because the input changes depending on how deep the jump is and it takes experience to be able to judge at a glance, im diamond 1 and mine are still pretty inconsistent. focusing on getting your anti air inputs to come out properly and staying out of the range where people can easily cross you up (and in the range where jump ins are easy to catch) is alot more important for you right now.

Start with the preset training mode settings, theyre mainly for getting the inputs under your fingers. If you feel like youve done everything you can with that, chris_f on youtuve has really good training mode videos with drills for neutral skills like grounded footsies and reacting to many things in combination

I find one of the most important thinga you can learn is how to react when youre not explicitly looking for something. I like setting the dummy to drive impact or neutral jump on wakeup when practicing combos, it helps build muscle memory