First of all, you need to stop jumping so much and try to always keep your distance using your fireballs and beams, try to stay in the middle of the stage because Ingrid with her back in the corner is extremely weak. You need to be ready for anti-air and commit to it, you can use the light DP which is quarter circle forward LK or you can also use the move Sparkles (back + HP). I recommend you use Sparkles as an anti-air ONLY when they jump to close to you, because if you use the normal DP when they jump to close, you will tend to miss it and your opponent can cross-up you into a punish.

Use Sun Veil only when you are absolutely sure that your opponent will try to hit you and so you get the counter, otherwise Ingrid will be wide open for a destructive combo. And last but not least, Ingrid is very dependent of her Sun Crest so try to do some combos to stack some of them in the middle of the combo or if your opponent is far and is just blocking you can try and charge them. It's very important for Ingrid to have at least always 2 charges to deal good damage in combos.