My point of asking about carb counting and whether you do it....
you need to be carb counting and be able to work out your own bolus ratio's before adjusting doses yourself.
You need to test pre meals, post meals, getting up and going to bed to see your patterns of rises and falls in blood.
Your DSN will go through this with you but
@jack412 has marvelous details to learn this information in your own time.
Your dsn should also get you on a dafne course as you are taking insulin and / or also you should see a dietitian.
Initially you cannot jump in yourself to do adjustments to insulin.