Agree, the timing of the dose before the meal can help...my team advised me (and we are all different so best speak with your nurse) to try 15 mins before eating...to let it start to work a bit, and of over 50g carbs in the meal to split the dose, some before some near the end, that helped me lots!
Plus the other really tricky thing is not to over treat the hypo...soooo hard!, especially when your body’s crying feed me argh what’s going on help sugar more more! Heheh I agree the jam prob better get it up quickly then stop, re test and eat a plain buscuit/apple etc to slow release. Otherwise you yo-yo and that feels pretty rubbish too.
I feel like I’m getting better control then I start to see loads out of range numbers..it’s really difficult at times, seems to be an ever changing thing so don’t worry and keep doing all you can to get on top of it. If you keep hypo lots and can’t see obvs cause like been very active etc then basal may need adjusting done a smidge. Good luck, you can do this! Use the op as a motivator x